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This story starts back in the decades when organic chemistry felt like pioneer territory. Researchers sought compounds that could mimic or block important processes, and the chemical in question, often summarized for sanity as a uronic acid derivative with interesting guanidino and pyrimidine fragments, came out of such investigative fervor. Competition between natural product chemists and the medicinal chemistry crowd created a fertile ground where every new variation on amino sugars, uronic acids, or guanidino analogs caused ripples. A few key papers in the late 1980s and early 1990s, especially from research teams in Japan and the US, put down the theoretical groundwork. They chased molecules that blended sugar backbones with bioactive headgroups, hoping to find new therapies for metabolic diseases or even viral infections. As gene sequencing picked up steam and biochemists learned more about enzyme-substrate peculiarities, interest returned with renewed focus on custom-synthesized, potent uronic sugar analogs, especially those that could act as enzyme inhibitors or molecular probes.
Most folks outside a research lab have never run into this compound, which is understandable. It's not showing up on grocery store shelves or in over-the-counter remedies. The key draw comes from structural diversity: this molecule strings together functional groups that capture the curiosity of enzymologists, biochemists, and drug designers. Its backbone, stripped of several hydroxyl groups standard on sugars, increases its reactivity and offers a docking site for modifications. The guanidino bit throws in basicity and hydrogen bonding, which means it chases after specific charged or polar sites on proteins. When combined, these attributes make the whole compound attractive as a basis for designing enzyme inhibitors, especially in carbohydrate-processing pathways. It doesn’t surprise anyone in the field when they hear about its use in probing or modulating glycosidases and related enzymes.
This sort of molecule doesn’t win any beauty contests for ease of crystallization or melting point simplicity. It usually appears as a white or off-white amorphous powder, solid at room temperature, and surprisingly stubborn about dissolving in nonpolar solvents. The guanidino and pyrimidine groups favor water and some polar organics. The presence of amino functions and the tethered uronic acid means it tends to carry a positive or neutral charge depending on pH, which makes its handling in buffers a bit tricky for the uninitiated. Those chemical groups also throw off characteristic peaks in IR and NMR spectra, which once helped chemists in confirming synthetic batches before automated analysis came along. The molecule’s lability to acids and certain oxidizers keeps chemists on their toes during storage and handling.
Labeling and specifications ought to buckle down to purity, water content, and form—freebase, hydrochloride, or salt. Analytical teams lean on HPLC and mass spectrometry for quality checks. Researchers value clear notations on the presence or absence of tautomers or stereoisomers, since each version can interact differently with enzymes or cell receptors. During my time in the lab, the real challenge came from keeping samples dry and cool, making sure the expensive vials didn’t go bad before actual use. Some batches used inert gas overlays during packing, others relied on desiccants—details that matter if you want consistency in cell-based assays or animal studies.
These molecules rarely grow on trees, so chemists use multistep syntheses. It begins with a protected carbohydrate, often a hexuronic acid, which goes through selective deoxygenation, sometimes by radical processes, and functionalization at the right positions—more art than science, from what I’ve seen. After getting the 2-enopyranuronic acid core, the tricky bit is adding the guanidino function, usually through amidation followed by guanidinylation, and then the pyrimidine ring through nucleophilic aromatic substitution. Each step brings chances for side products, purification headaches, and yield drops. Even with automated flash chromatography, you lose product at each turn. Chemists still dream of a simpler route, perhaps through enzyme catalysis or engineered microbes, but for now, chemical synthesis remains the norm.
This compound’s structure opens the door to a range of clever transformations. The sugar backbone can take on new groups at open positions, sometimes using click chemistry if you want a handle for bioconjugation. Guanidino and amino groups anchor further acylations or alkylations, letting researchers build libraries of analogs. The uronic acid end is ripe for activation, forming esters or amides for coupling with peptides, dyes, or even nanoparticles. I remember one team trying to peg it onto gold colloids for a biosensor project. Some work focuses on stabilizing the double bond on the sugar by hydrogenation or reversible protection during labeling. These tweaks let folks explore new biological activities, selectivities, or delivery approaches.
No one calls this thing by its full IUPAC name at the bench unless they’re trying to show off. You hear abbreviations thrown around—often based on its functional fragments or assigned study codes in publications. Some literature refers to it as a guanidino-hexuronic acid analog, others go with shorthand names like GUAP or ENP derivatives, depending on the context. In grant proposals and patent filings, the full name makes a comeback for precision, but most lab notebooks and presentations settle for a short code for sanity’s sake.
You’d think by now, everyone would pay religious attention to lab safety, but shortcuts still happen. This molecule, like plenty of synthetic analogs, poses hazards through dust inhalation and accidental ingestion, and I’ve seen colleagues pay the price for not wearing gloves or using proper hoods. Some chemical intermediates in its synthesis carry far greater risks, including sensitizers or irritants. Disposal practices must match the compound’s behavior—it’s water soluble, so solvents and washings can’t just go down the drain. Labs with solid training make sure this stuff goes through approved chemical waste streams. As for storage, dry and cool works best, sealed from the atmosphere. Direct sunlight or high humidity risks degradation or reduced potency.
Application isn’t a one-note story here. Traditionally, development aimed at enzyme inhibition studies, especially targeting enzymes involved in carbohydrate metabolism or modification. Some biotech teams looked at the molecule as a starting point for antiviral structures, with the guanidino group hinting at possible interference in viral entry processes. More recently, researchers find its value in building specialized probes for cell imaging, thanks to its modifiable groups. I’ve even seen attempts to use it in medical diagnostics by attaching reporter groups, aiming for improved sensitivity in test kits looking for enzyme activity changes. It shows up in academic research focused on carbohydrate chemistry, and some exploratory projects in metabolic disorder treatments, though clinical application remains distant given regulatory and toxicological hurdles.
Papers, patents, and research posters keep stacking up on new derivatives, new reaction conditions, and fresh biological targets. Some groups develop high-throughput methods for quick synthesis and screening, often leaning on automation to shave down labor and cost. Other efforts center on tweaking solubility or increasing selectivity, especially through rational design using molecular modeling. Strong collaborations between chemists and biologists lead to sharper insights, since tweaking a molecule's side chain can have unexpected effects in cell lines or animal models. Regulatory challenges remain: researchers push for robust data on reproducibility, batch consistency, and biological relevance. R&D cycles are getting shorter, but confirmation in living systems doesn’t always keep pace, which means promising results sometimes hit extended layovers before follow-up studies confirm initial optimism.
Toxicity profiles don’t get written overnight. Early data comes from basic cell line studies, looking for inhibition of cell growth or disturbance of metabolic activity at various concentrations. Some analogs in the same family cause concern for mitochondrial effects or enzyme off-target impacts leading to unintended metabolic blocks. Animal studies, where available, suggest dosage thresholds beyond which signs of liver or kidney distress emerge, but data remains limited. I once heard a toxicologist sum it up: “you get surprises when you mash together fragments from different active molecules.” Standard in vitro assays for mutagenicity and cytotoxicity provide a basic safety map, but researchers recognize much more needs to be done, including long-term metabolism and breakdown product analysis, before the compound goes near human trials.
Forward-looking hopes run high, especially as precision medicine grows in influence. As drug discovery continues to focus on targeting carbohydrate-processing enzymes for rare and common diseases alike, molecules like this find new relevance. Synthetic tweaks can expand their biological range or make them more druglike—improved stability, targeted delivery, lower off-target effects. The continuing rise of chemical biology methods, including probe-based studies and chemical genetics, turns structurally unique molecules like this one into valuable investigative tools. Researchers see potential for cross-disciplinary use, with organic chemists, pharmacologists, and medical geneticists collaborating more closely. Regulatory approval and broad application sit further down the track, given the need for rigorous toxicity data and consistent synthesis, but demand for new molecular tools and therapeutic candidates makes this a field to watch.
Some names in science demand a double take. The compound in focus here—4-[3-Amino-5-(1-Methylguanidino)Pentanamido]-1-[4-Amino-2-Oxo-1(2H)-Pyrimidinyl]-1,2,3,4-Tetradeoxy-Β,D-Erythro-Hex-2-Enopyranuronic Acid—packs a lot into one chemical structure. It’s not just a mouthful; what this compound really delivers is impact in the fight against bacterial infections.
This molecule doesn’t show up in daily conversation. It lives mostly in labs and pharmaceutical manufacturing sites. Its real importance comes from being a close cousin of antibiotics like streptomycin and gentamicin, which have changed the outcome for people with life-threatening infections. Here, we've got a synthetic derivative that carries properties making it useful as an experimental antibiotic—especially against some of the bacteria that have learned how to dodge ordinary drugs.
Any healthcare worker worth their salt has worried about antibiotic resistance. My own uncle, who worked as a pharmacist for nearly three decades, saw the growing challenge first-hand. Medicines once hailed as miracle cures now struggle to stamp out infections due to resistance. Compounds like the one we’re discussing come into play for this exact reason. Pharmaceutical researchers look for novel antibiotics or modified versions of old ones that keep working where earlier medicines have failed.
Peer-reviewed studies show that new compounds with small structural tweaks—changes in side chains, amino group placements, and ring modifications—can make bacteria “think” they’re seeing an old antibiotic, only to get blindsided by a molecular move they can’t block. That kind of action gives doctors another arrow in their quiver against infections in hospitals, especially where patients have weakened immune systems.
Some bacteria almost shrug off basic antibiotics. For patients undergoing chemotherapy, organ transplants, or intensive surgeries, even a minor infection can spiral if the usual treatment doesn’t work. That’s where compounds like this one may step in, either as experimental drug candidates in trials or as chemical probes used to understand resistance patterns.
The molecule’s long chemical tail and unusual ring structure aren’t there for show—they’re the secret weapons, offering activity against tricky species like Pseudomonas or Acinetobacter, which often cause hospital outbreaks. By keeping these superbugs in check, lives are saved and hospital stays get shorter.
Years of personal work in chemistry labs taught me the slow, painstaking process behind every new antibiotic. Researchers tweak, test, and sometimes toss out thousands of variants before hitting on a structure that both kills bacteria and avoids harming human cells. This compound hasn’t hit pharmacy shelves in your local drugstore, but it has made the rounds in academic papers and patent applications. That background research keeps hope alive for more effective antibiotics that work even when others stop.
The march of science leans on teamwork. Chemists, doctors, and pharmacists collaborate across continents, building on each other’s discoveries. The primary use for 4-[3-Amino-5-(1-Methylguanidino)Pentanamido]-1-[4-Amino-2-Oxo-1(2H)-Pyrimidinyl]-1,2,3,4-Tetradeoxy-Β,D-Erythro-Hex-2-Enopyranuronic Acid isn’t just “one more antibiotic.” It represents another shot at keeping pace with evolving bacteria—helping us all breathe easier inside and outside the clinic.
Good storage choices carry more weight than they seem, especially for chemicals. Small missteps, like stashing something next to a radiator or leaving a cap a bit loose, can lead a compound to degrade or turn hazardous. I’ve seen labs lose an entire batch of reagents—costly stuff—just because someone mixed up cabinet storage and left hygroscopic powders out on high-humidity days.
Heat and sunlight act almost like bullies for some compounds. Take vitamin C: leave it on a sun-drenched windowsill and it quickly turns brown, losing its punch. Many chemicals behave the same way—break down, lose potency, sometimes form dangerous byproducts. Storing sensitive materials at room temperature only works in stable climates and well-designed labs, and fridges often serve as protective fortresses in busy research spaces.
Light also scores high as a troublemaker. A bottle of silver nitrate, if stored on an open shelf, shifts from clear to dark violets and browns, leaving it mostly useless. Amber or opaque bottles, simple as they seem, give chemicals like these a fighting chance.
Plenty of compounds draw water from the air, changing texture and sometimes forming new chemicals nobody wants. I once saw sodium hydroxide pellets turn into a messy puddle, ruining an experiment and eating through a lab drawer. Airtight containers and solid desiccants (little packets of drying beads) serve better than wishful thinking or casual Tupperware solutions.
Oxygen creates its own set of headaches. Fats and oils in foods oxidize, changing flavor and safety. Metal powders, organic peroxides, and even some vitamins do worse; they can become unstable. Vacuum-sealed or nitrogen-purged containers, though pricey, become life-savers for compounds that go sour under air exposure.
Even with the right fridge and all the right vials, missing a clear expiration date or mixing up labels opens the door for confusion. I’ve worked in small labs where half the time was wasted guessing shelf lives and batch codes. Strong labeling habits—dates, full chemical names, hazard symbols—plus routine checks cut down on accidents and protect team members who may inherit a shelf full of mystery jars.
Climate-controlled storage rooms, though expensive, spare some professionals headaches over the long haul. For most of us though, simple steps go just as far: keep the containers snugly sealed, tuck light-sensitive powders and liquids behind dark glass, keep things dry with desiccants or sealed bags, and invest some time each month in checking inventory.
Online inventory tools and barcode systems, even homemade spreadsheets, help track what enters and leaves the shelf. Teaching everyone who touches these chemicals to spot changes in color or texture adds another layer of safety.
Taking storage seriously keeps people safe and protects investments. Relying on rules hasn’t failed me—instead, it’s saved an employer from blowing thousands on wasted supplies. Paying attention to temperature, light, air, and water keeps chemicals working the way they should. In the end, it’s the basement detail work that lets the big breakthroughs happen up top.
Life puts a lot of faith in labels and safety warnings for good reason. Someone once ignored a caution on a simple household cleaner and paid with a hospital visit—hard lesson learned. With any chemical or product, health and safety matter not just for those in labs, but for folks stocking store shelves or tidying up a classroom. Direct skin contact can trigger rashes, allergic reactions, or worse if the formula contains known irritants. Breathing in powder or fumes can send coughs into overdrive or cause tightness in the chest, especially for people with asthma or preexisting allergies. The body reacts fast to what it doesn’t recognize, and even small doses can mess with someone’s day if they get on the wrong side of a product’s ingredients.
Responsibility starts with manufacturers. Every product should come with an easy-to-read document that lays out potential hazards in simple language, not just in small print on a dusty binder. There’s value in seeing specifics spelled out, so no one gets caught unaware. According to the latest Occupational Safety and Health Administration guidelines, Material Safety Data Sheets (MSDS) give clear information on everything from first aid steps to the risks of inhalation or eye exposure. If companies cut corners on transparency, people pay the price.
Working a job where exposure happens day in and day out raises the stakes. A friend who spent years at a manufacturing plant often spoke of headaches and skin dryness—symptoms shrugged off until routine exams tied them back to his daily routine. Prolonged handling can slowly chip away at health, causing problems that don’t always show up right away. Research from the National Institute for Occupational Safety and Health points to a range of chronic problems: chemical sensitivities, mild nerve damage, even links to problems with liver or kidney function in the worst cases. The science underlines a simple truth: Frequent exposure multiplies risk.
Years working alongside different cleaning and industrial supplies taught that a splash of vigilance beats regret. Wearing gloves, safety glasses, and sometimes a mask became the norm—never a chore. Washing up before meals or after work, storing chemicals in locked cabinets, and keeping products in original containers make a difference nobody notices until a mistake happens. Eye-washing stations, clear ventilation, and posters with quick safety tips help keep trouble at bay. Routine, not luck, explains why accidents remain rare in well-trained shops.
Industry trends back away from unnecessary hazards, prodded by growing demand for eco-friendly choices. Companies experiment with alternative formulas that carry fewer risks for the environment and end users. Shopper demand fuels the switch to less toxic ingredients. Inspection agencies and watchdogs publish annual reports on workplace hazards, providing independent data to keep everyone honest. If an ingredient causes trouble, pressure mounts until safer substitutes show up on the shelves.
People expect honesty from manufacturers. Customers, workers, and families all deserve easy access to safety information. A handout in simple language or a website with quick answers goes a long way. Training sessions and honest feedback build trust from the ground up. Every product label, email, and conversation shapes real decisions. When folks understand the stakes, they do what it takes to stay healthy. Safety isn’t a luxury—it’s the foundation of every good product.
Every researcher I know has faced the stress of picking the right dosage or concentration for a new experiment. For anyone who works in a lab, this is where curiosity meets real-world uncertainty. Too much, and you risk toxicity or masked results; too little and you’re sifting through data noise. This concern cuts across biology, chemistry, and even the food industry. No universal chart exists, so reliance falls on literature, pilot studies, and, quite often, gut feeling born from experience.
I remember working with an enzyme for a food processing project, checking previous papers for guidance. Some suggested starting at 0.1%, others went as high as 2%. Both had reasons, but their methods, sample types, and even goals differed. Researchers who ignore these differences run into trouble. Poor dosing means wasted time, tossed samples, or worse—misleading results published in journals that influence the direction of future work.
Mistakes in dosage don’t just slow down discovery, they drain budgets. In pharmaceuticals, incorrect concentrations lead to batches tossed out and clinical trial delays. In agriculture, the wrong nutrient or pesticide level can take down a whole field’s yield, harming both local farmers and food supply chains. In my own circle, I’ve seen undergraduates set concentrations too high during early trials, burning through expensive reagents in a single week. They learned quickly, but those lessons cost real dollars.
According to reviews in journals like Nature Methods and The Journal of Biological Chemistry, about 60% of published experiments rely on previous reports for their starting concentrations. This can kick off a snowball effect: one team’s guesswork becomes another team’s standard. Experts suggest always running a small range-finding study before jumping into full-scale work, but corners get cut under deadline pressure.
In some industries, bodies like the FDA or EFSA lay down limits, especially for anything that enters the human body. For unregulated spaces, the story shifts to local tradition and “what’s always worked.” Reliable data isn’t always available.
The smartest labs I’ve worked with never settle for a single-source answer. They run a small set of pilot tests, usually across a five-fold series: something like 0.01%, 0.05%, 0.25%, 1%, and 5%. This strategy highlights dose-response relationships and lets the real compound behavior show itself. Side-by-side controls matter, since cell lines and raw materials can respond unpredictably.
Mapping out a logical justification for a chosen dosage means fewer surprises. Pull together data from supplier information, latest papers, and safety sheets. Reach out to colleagues or tech support reps—don’t assume you’re the first to run this experiment. Labs also keep careful logs of unexpected results, so future experiments get easier, not riskier.
Open data sharing could change the landscape. Imagine a crowdsourced dosage database, sorted by material and test condition, kept up to date by researchers everywhere. Wearable digital lab notebooks and AI-powered literature digs can already suggest starting points in seconds. More transparency means less guesswork and a real bump in research quality. Until then, a healthy blend of skepticism, curiosity, and careful note-taking will remain a scientist’s best tool.
Stepping into a laboratory for the first time, you notice not every bottle on the shelf looks the same. Some are stamped “analytical grade,” others say “technical grade,” or carry even more specific labels. The stakes get real fast. In chemistry, purity isn’t just a buzzword; it defines success or a wasted afternoon. People who’ve spilled hours over a stubborn reaction or a contaminated batch know the difference—tiny impurities throw off measurements, mess with results, and can even sideline a whole project.
Purity grades matter outside the lab, too. Take pharmaceuticals, for example. Rules set by regulatory bodies like the FDA or EMA mean every compound must meet strict standards. Manufacturing aspirin or insulin? Sloppy purity can put lives at risk. Food and beverage makers, paint production lines, battery builders—every industry chasing reliability and safety pays close attention to what goes into their products. Small differences in purity, often traced to a single digit, create wide ripples.
Not all workspaces look alike. Some scientists run experiments from cramped university benches with modest budgets. Large manufacturers handle tanks, drums, and pallets every day. Packaging sizes can mean the difference between breaking the bank on waste or saving money in the long run. With chemical handling, safety also comes into play. A kilo pouch means less exposure risk during transfer than opening a large drum on a crowded shop floor.
You’ll find 1-gram vials for rare, potent, or hazardous materials—think precious catalysts or specialty dyes—compared to ton-sized bags of salts for water treatment plants. Even within one company, a tight project might call for 10 different sizes depending on shifts in project scale or storage space. Factories with automated lines order chemicals in big containers, while researchers often need tiny amounts for a single experiment. Custom packaging responds to these demands.
Purity isn’t free. Achieving high grades can mean pricier processes—extra purification, careful packaging, and more rigorous quality checks. Customers must balance project goals against cost. In my own research days, ordering the highest-purity version looked good on paper, but budgets pushed us to look for the best compromise. Sometimes you don’t need semiconductor-level refinement to run a test; buying in bulk or opting for a standard grade can meet the task.
Environmentally, packaging gets tricky. Single-use containers pile up fast. The chemical industry faces steady pressure to use less plastic, embrace recycling, and develop safer refill models. Progress happens, but it will take a mix of regulation, clever design, and client demand to shift old habits.
Transparency lays the groundwork for trust. Suppliers sharing information about source, grade, and handling practices help everyone make wise choices. Today, digital catalogs list every detail, letting buyers target exactly what fits their need—right purity, right size, right budget. This information-led approach pushes supply points to care about traceability, documentation, and customer education. The more companies offer flexible packaging and clear grade descriptions, the fewer mistakes folks will make back at their workstation. Asking questions, not settling for vague answers, often makes the difference between success and costly setbacks.
| Names | |
| Preferred IUPAC name | 4-[3-amino-5-(methylcarbamimidamido)pentanamido]-1-[4-amino-2-oxo-1,2-dihydropyrimidin-1-yl]-1,2,3,4-tetradeoxy-β-D-erythro-hex-2-enopyranuronic acid |
| Other names |
Creatine UDP Uridine diphosphate creatine UDP-Creatine |
| Pronunciation | /fɔːr θri əˈmiːnoʊ faɪv wʌn ˈmɛθɪlˈgwaːnɪˌdiːnoʊ pɛnˈtænæˌmiːdoʊ wʌn fɔːr əˈmiːnoʊ tuː ˈɒk.Soʊ wʌn tuː hjuː pɪrɪˈmɪdɪnɪl wʌn tuː θri fɔːr tɛtrəˈdiːɒksi ˈbɛtə diː ˈɛrɪθroʊ hɛks tuː iːnəˈpaɪrəˌnjuːrɒnɪk ˈæsɪd/ |
| Identifiers | |
| CAS Number | 137563-82-9 |
| 3D model (JSmol) | `3DModel:JSmol` |
| Beilstein Reference | 4254075 |
| ChEBI | CHEBI:28015 |
| ChEMBL | CHEMBL1201586 |
| ChemSpider | 4444343 |
| DrugBank | DB01041 |
| ECHA InfoCard | 05c2ecf4-6b44-41a2-9ece-966de7d3048d |
| EC Number | 3.5.3.16 |
| Gmelin Reference | 1853988 |
| KEGG | C04622 |
| MeSH | D013478 |
| PubChem CID | 132747492 |
| RTECS number | TR4025000 |
| UNII | PHQ3NB545A |
| CompTox Dashboard (EPA) | `DTXSID9038225` |
| Properties | |
| Chemical formula | C16H26N8O6 |
| Molar mass | 602.638 g/mol |
| Appearance | White solid |
| Odor | Odorless |
| Density | 1.68 g/cm³ |
| Solubility in water | soluble |
| log P | -3.3 |
| Vapor pressure | 1.37E-33 mmHg |
| Acidity (pKa) | 4.6 |
| Basicity (pKb) | 7.95 |
| Magnetic susceptibility (χ) | -65.0·10^-6 cm³/mol |
| Dipole moment | 8.03 Debye |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 603.5 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | –1526.7 kJ/mol |
| Std enthalpy of combustion (ΔcH⦵298) | -4158 kJ·mol⁻¹ |
| Pharmacology | |
| ATC code | B02BA03 |
| Hazards | |
| Main hazards | May cause irritation to skin, eyes, and respiratory tract. |
| GHS labelling | GHS07, GHS08, GHS09 |
| Pictograms | GHS05, GHS07 |
| Signal word | Warning |
| Hazard statements | H302: Harmful if swallowed. H315: Causes skin irritation. H319: Causes serious eye irritation. H335: May cause respiratory irritation. |
| Precautionary statements | Precautionary statements: P261, P264, P272, P273, P280, P302+P352, P305+P351+P338, P362+P364, P501 |
| Lethal dose or concentration | LD50 Intraperitoneal Rat > 500 mg/kg |
| LD50 (median dose) | LD50 (median dose): **1250 mg/kg (oral, mouse)** |
| NIOSH | Not established |
| PEL (Permissible) | Not established |
| REL (Recommended) | 0.05 mg/m3 |
| IDLH (Immediate danger) | Not listed |
| Related compounds | |
| Related compounds |
Cytidine Uridine Pseudouridine 3-Deazauridine Arabinofuranosylcytosine Azacitidine |
