
Nucléotides
Les nucléotides sont des composés organiques qui servent de building blocks aux acides nucléiques, essentiels à la formation de l'ADN et de l'ARN. Chaque nucléotide est composé d'une base azotée, d'une molécule de sucre et d'un ou plusieurs groupes phosphate. Ces nucléotides s'assemblent pour former de longues chaînes, créant le matériel génétique qui porte et transmet l'information génétique dans tous les organismes vivants. Dans cette section, vous trouverez une large gamme de nucléotides essentiels pour la recherche en génétique, biologie moléculaire et biochimie. Ils sont fondamentaux pour étudier les processus génétiques, synthétiser des acides nucléiques et développer des outils diagnostiques et thérapeutiques. Chez CymitQuimica, nous proposons des nucléotides de haute qualité pour soutenir vos recherches scientifiques et applications, garantissant précision et fiabilité dans vos expériences.
Sous-catégories appartenant à la catégorie "Nucléotides"
2634 produits trouvés pour "Nucléotides"
Trier par
Degré de pureté (%)
0
100
|
0
|
50
|
90
|
95
|
100
2',3'-O-Isopropylideneadenosine
CAS :<p>2',3'-O-Isopropylideneadenosine is a nucleoside that has a possible usage as an organic chemical synthesis intermediate</p>Formule :C13H17N5O4Degré de pureté :Min. 98 Area-%Couleur et forme :White PowderMasse moléculaire :307.31 g/molThymidine
CAS :<p>Thymidine, also known as deoxythymidine (dT), is a pyrimidine deoxynucleoside that pairs with deoxyadenosine (dA) in a double stranded DNA. It’s used as a biochemical modulator of antimetabolites such as 5-fluorouracil (5-FU), 1-beta-D-arabinofuranosylcytosine (Cytarabine) and methotrexate (MTX) in cancer therapy. It’s also the enantiomer of telbivudine, an antiviral drug used to treat hepatitis B virus (HBV) infection.</p>Formule :C10H14N2O5Degré de pureté :Min. 99.0 Area-%Couleur et forme :White PowderMasse moléculaire :242.23 g/molGlycinamide ribonucleotide
CAS :<p>Glycinamide ribonucleotide (GAR) is a reactive metabolite that is formed from glycinamide, which is an intermediate in the synthesis of purines. GAR has been shown to bind to intracellular targets and inhibit their enzyme activities. GAR has been shown to inhibit the activity of enzymes that are involved in the synthesis of purines, such as ribonucleotides and nucleoside phosphates. These enzymes have been found in human tissues. GAR also inhibits the polymerase chain reaction (PCR) by binding to DNA and inhibiting its replication. This drug has also been shown to be effective against bowel disease by binding to bacterial dna gyrase, dna topoisomerase, and rna synthesis.</p>Formule :C7H15N2O8PDegré de pureté :Min. 80 Area-%Couleur et forme :PowderMasse moléculaire :286.18 g/mol1-(5-O-Acetyl-2,3-dideoxy-ß-L-glycero-pent-2-enofuranosyl)-5-fluorouracil
CAS :<p>1-(5-O-Acetyl-2,3-dideoxy-ß-L-glycero-pent-2-enofuranosyl)-5-fluorouracil is a modified nucleoside analog with structural alterations that enhance its biological properties and stability. The compound features 5-fluorouracil as the nucleobase, a fluorinated pyrimidine often used in chemotherapy due to its ability to interfere with DNA replication. The sugar component is 2,3-dideoxy-β-L-glycero-pent-2-enofuranose and has a specific glycerol and enol configuration, which alters its interactions with enzymes involved in nucleic acid metabolism. The compound includes a 5-O-acetyl protecting group at the 5'-position, which shields the hydroxyl group during synthesis.</p>Formule :C11H11FN2O5Degré de pureté :Min. 95%Masse moléculaire :270.21 g/molCytidyl-3'-5'-uridine ammonium
CAS :<p>Cytidyl-3'-5'-uridine ammonium salt is a nucleoside analog that is used as an antiviral and anticancer agent. Cytidyl-3'-5'-uridine ammonium salt inhibits the synthesis of DNA by inhibiting the activity of enzymes such as DNA polymerase, RNA polymerase, or reverse transcriptase. It also has antitumor properties and can be used to treat leukemia and other types of cancer. Cytidyl-3'-5'-uridine ammonium salt has been shown to be more potent than cytidyl-2',4',6'-triaminopyrimidine (CTAP) in inhibiting the growth of lymphocytic leukemia cells.</p>Formule :C18H24N5O13P•NH3Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :566.42 g/molCladribine
CAS :<p>Deoxyadenosine analog resistant to adenosine deaminase</p>Formule :C10H12ClN5O3Degré de pureté :Min. 97 Area-%Couleur et forme :PowderMasse moléculaire :285.69 g/molRef: 3D-NC06337
Produit arrêté5'-O-DMT-2'-O-methylcytidine
CAS :<p>5'-O-DMT-2'-O-methylcytidine is a monophosphate nucleoside of cytidine. It is used as an antiviral agent and has been shown to have anticancer effects in vitro. 5'-O-DMT-2'-O-methylcytidine is synthesized by modification of the natural deoxyribonucleosides, which are then phosphoramidited to form a 5'-O-DMT-2'-O-methylcytidine monophosphate. The synthesis process also produces diphosphate and triphosphate forms of the nucleoside, which can be used for other purposes.</p>Formule :C31H33N3O7Degré de pureté :Min. 95%Masse moléculaire :559.61 g/mol5-Iodocytidine
CAS :<p>5-Iodocytidine is a nucleoside analogue that has been shown to possess potent antitumor activity. It is also used as a fluorescent probe for detection of uridine in biological samples. 5-Iodocytidine is structurally similar to uridine, which allows it to be taken up by cells and incorporated into RNA. This analog can also be detected with antibody response, as well as with the use of a fluorescence microscope. 5-Iodocytidine may have the potential to treat infectious diseases and autoimmune diseases because it binds to response elements on DNA and activates gene transcription.</p>Formule :C9H12IN3O5Degré de pureté :Min. 98 Area-%Couleur et forme :White PowderMasse moléculaire :369.11 g/molN6-Benzoyl-2',3'-isopropylideneadenosine
CAS :<p>N6-Benzoyl-2',3'-isopropylideneadenosine is a nucleoside that is structurally related to the natural nucleosides adenosine, deoxyadenosine, and deoxyguanosine. It is an antiviral agent that has been shown to be an activator of the enzyme ribonucleotide reductase. N6-Benzoyl-2',3'-isopropylideneadenosine is a modified nucleoside with high purity and high quality. The CAS number for this compound is 39947-04-1. This compound has not been found in nature, but it can be synthesized by modifying nucleosides or by using phosphoramidites.</p>Formule :C20H21N5O5Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :411.41 g/molN2-DMF-5'-O-DMT-2'-O-methylguanosine
CAS :<p>N2-DMF-5'-O-DMT-2'-O-methylguanosine is a novel nucleoside analog that has antiviral, anticancer and immunomodulating properties. It is synthesized from 2′,3′-dideoxyadenosine 5′-monophosphate by the condensation of 2,6-dimethylaniline with methylguanosine 5′-monophosphate and 5,6-dimethylaniline. The modification of the guanine base in N2-DMF-5'-O-DMT-2'-O-methylguanosine to an O6 -methyl group results in increased affinity for the ribonucleotide reductase enzyme (RNR) and inhibition of DNA synthesis.</p>Formule :C35H38N6O7Degré de pureté :Min. 95%Masse moléculaire :654.71 g/mol7-Cyano-7-deaza-2'-deoxyadenosine
CAS :<p>7-Cyano-7-deaza-2'-deoxyadenosine is a nucleoside analog that inhibits the growth of virus by competing with deoxyadenosine for incorporation into DNA and RNA. 7-Cyano-7-deaza-2'-deoxyadenosine also stabilizes dna duplexes and prevents them from breaking down. It has been shown to be effective against herpes simplex virus, which causes painful blisters on the skin or genitals. This drug has been used in clinical trials as an antiviral agent. 7-Cyano-7-deaza-2'-deoxyadenosine is synthesized from 2',3'-didehydrocytidine under the following conditions:</p>Formule :C12H13N5O3Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :275.26 g/mol2'-Deoxy-2'-fluoro-5-iodouridine
CAS :<p>2'-Deoxy-2'-fluoro-5-iodouridine is a nucleoside analog that is a modified version of uridine, where the 2'-fluoro modification is added to the sugar (deoxyribose), and an iodine atom is attached at the 5' position of the uracil base. This combination of modifications provides unique properties that may be useful for research and therapeutic applications.</p>Formule :C9H10FIN2O5Degré de pureté :Min. 95%Couleur et forme :White PowderMasse moléculaire :372.09 g/mol3'-O-Methyluridine
CAS :<p>3'-O-Methyluridine is a nucleoside that is used in the preparation of oligonucleotides and as a substrate for uridine phosphorylase. It is used to study the termination of RNA synthesis, which occurs when there are no more ribose residues in the RNA template strand. When this happens, an adenosine residue is added by polyphosphate kinase to the 3' end of the RNA strand. This addition causes a release of pyrophosphate and leads to end of DNA synthesis. The acid hydrolysis technique can be used to separate 3'-O-methyluridine from other nucleotides. This reaction produces guanosine, which can be detected using polymerase chain reaction (PCR) techniques such as polyacrylamide gel electrophoresis (PAGE).</p>Formule :C10H14N2O6Degré de pureté :Min. 95%Couleur et forme :White PowderMasse moléculaire :258.23 g/mol4-Hydroxy-6-methylpyrimidine
CAS :<p>4-Hydroxy-6-methylpyrimidine (4-OHMP) is a metabolite of trimethyltin. It is formed in the liver by methylation of 4,6-dimethylpyrimidine (4,6-DMPU). The levels of 4-OHMP in urine samples are used to monitor exposure to this agent. The median values for urinary concentrations of 4-OHMP are typically 10 times higher than those found in blood samples. The metabolite can be detected in urine up to 2 weeks after an individual’s last contact with trimethyltin. This compound has been shown to inhibit the synthesis of glycol dimethyl ethers and carbamates.</p>Formule :C5H6N2ODegré de pureté :Min. 95%Masse moléculaire :110.11 g/mol2'-Deoxy-6-O-methyl-guanosine
CAS :<p>2'-Deoxy-6-O-methyl-guanosine is a methylated nucleoside that has been shown to inhibit protein synthesis in cancer cells. It does so by inhibiting the synthesis of DNA, which is required for the production of proteins. This compound also inhibits monoclonal antibody production, which may be due to its ability to methylate DNA and prevent dna duplexes from being repaired. 2'-Deoxy-6-O-methyl-guanosine is used as a probe in the detection of human proteins by fluorescence spectroscopy. The sensitivity of this probe has been shown to be greater than 10 ng/mL, making it ideal for use in clinical settings where small quantities of proteins are present.</p>Formule :C11H15N5O4Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :281.27 g/mol7-Deaza-2'-deoxyinosine
CAS :<p>7-Deaza-2'-deoxyinosine is a purine nucleoside analog that has been shown to be a hydrogen bond donor and formamide acceptor. This drug destabilizes duplex DNA by interfering with the formation of the hydrogen bonds between the bases, which may result in strand breakage. 7-Deaza-2'-deoxyinosine has also been shown to inhibit RNA polymerase activity, thereby inhibiting protein synthesis. It has been used as a tool for studying enzyme mechanisms and in solid phase synthesis.</p>Formule :C11H13N3O4Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :251.24 g/mol2'-Deoxy-8-oxo-adenosine
CAS :<p>2'-Deoxy-8-oxo-adenosine is a nucleoside that is a hydrogen bond donor. It is an analogue of adenosine, and has been shown to inhibit the growth of breast cancer cells. 2'-Deoxy-8-oxo-adenosine reacts with the enzyme dATP pyrophosphohydrolase to form 8-oxo-2'-deoxyadenosine, which inhibits mitochondrial DNA synthesis by preventing the incorporation of inorganic phosphate into mitochondrial DNA. This process leads to reduced ATP production, leading to cell death. The reactive properties of 2'-Deoxy-8-oxo-adenosine make it suitable for use as a probe molecule in chemical biology, as well as in biochemical studies on human serum.</p>Formule :C10H13N5O4Degré de pureté :Min. 95 Area-%Couleur et forme :PowderMasse moléculaire :267.25 g/mol2,2'-Anhydrouridine
CAS :<p>The nucleophilic opening of 2,2'-Anhydrouridine represents a novel synthetic approach for elaborating the ring of nucleosides. For example, compounds such as 2-amino-, 2-fluoro- and 2-phenylseleno-2-deoxyuridines are prepared from the nucleophilic opening of 2,2'-Anhydrouridine.Â2,2'-Anhydrouridine inhibits uridine phosphorylase, a key enzyme targeted by some antitumor drugs.</p>Formule :C9H10N2O5Degré de pureté :Min. 98 Area-%Couleur et forme :White Off-White PowderMasse moléculaire :226.19 g/molDiquafosol Impurity 2
CAS :<p>Diquafosol Impurity 2 is a high-purity phosphoramidite that can be used for the synthesis of DNA, RNA, and deoxyribonucleosides. This product is also a novel activator for phosphoramidites. Diquafosol Impurity 2 has CAS No. 63785-59-1 and a molecular weight of 228.24 g/mol. It is insoluble in water, but soluble in most organic solvents.</p>Formule :C18H25N4O20P3Degré de pureté :Min. 95%Masse moléculaire :710.33 g/mol7-Deaza-2'-C-methyladenosine
CAS :<p>Anti-HCV agent; inhibitor of viral RNA polymerases</p>Formule :C12H16N4O4Degré de pureté :Min. 95 Area-%Couleur et forme :Off-White PowderMasse moléculaire :280.29 g/mol5-(Azidomethyl)-2’-deoxyuridine
CAS :<p>5-azidomethyl-2-deoxyuridine (AmdU) is a nucleoside that contains an azide group. The structure of the nucleoside is similar to thymidine, and it is incorporated into nascent DNA by cellular polymerases, similarly to EdU (NE08701). Unlike EdU that needs to be further modified with azides in the presence of copper catalyst, AmdU can also react in the absence of copper catalyst using spAAC Click Chemistry with strained cycloalkynes, such as cyclooctynes. This enables detection of nascent DNA in benign, copper free conditions.</p>Formule :C10H13N5O5Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :283.24 g/molN6-Benzyladenosine 5'-monophosphate sodium salt monohydrate
CAS :<p>N6-Benzyladenosine 5'-monophosphate sodium salt is a nucleoside that is not identified. It has been shown to be metabolized by adenosine deaminase and may have antitumor activity. N6-Benzyladenosine 5'-monophosphate sodium salt is also a radioactively labeled adenine analog that has been used in the study of metabolic pathways.</p>Formule :C17H18N5Na2O7P·H2ODegré de pureté :Min. 97 Area-%Couleur et forme :PowderMasse moléculaire :499.32 g/mol2'-Deoxy-5'-O-DMT-2'-fluoro-N4-phenoxyacetylcytidine
<p>2'-Deoxy-5'-O-DMT-2'-fluoro-N4-phenoxyacetylcytidine is a monophosphate nucleotide analog that is used as an antiviral agent. It inhibits viral replication by inhibiting the activity of DNA polymerase, which is needed to synthesize DNA. 2'-Deoxy-5'-O-DMT-2'-fluoro-N4-phenoxyacetylcytidine has been shown to be effective against HIV and HSV in vitro and in vivo. This nucleotide analog has also been shown to be potent against Hepatitis B viruses and adenovirus type 3.<br>2'-Deoxy-5'-O-DMT-2'-fluoro-N4-phenoxyacetylcytidine is phosphoramidate derivative of cytosine with a fluorine substitution at the 2' position on the sugar moiety, making it a novel compound. The pyrid</p>Formule :C38H36FN3O8Degré de pureté :Min. 98 Area-%Couleur et forme :Yellow PowderMasse moléculaire :681.71 g/molL-Cytidine
CAS :<p>L-Cytidine is a nucleoside that is found in the body, and is also used as a drug. It is a precursor to other nucleosides, such as cytidine triphosphate, which is involved in DNA synthesis and repair. L-Cytidine has been shown to be effective against HIV infection by inhibiting the activity of the enzyme ns3 protease. This inhibition prevents viral proteins from being released from cells and infecting other cells. L-Cytidine has also been shown to be an inhibitor of creatine kinase and glycosidation, two enzymes that are necessary for cell metabolism. L-Cytidine has also been shown to be reactive with halides, which may lead to unwanted side effects.</p>Formule :C9H13N3O5Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :243.22 g/molPolyinosinic-polycytidylic acid sodium salt
CAS :<p>Polyinosinic acid-polycytidylic acid (Poly I:C), an agonist of TLR3 toll-like receptors, is a synthetic double-stranded RNA analog, consisting of polyinosinic acid (poly I) paired with polycytidylic acid (poly C), forming a stable duplex structure. PolyI:C stimulates the secretion of pro-inflammatory cytokines and type I interferon through its interaction with endosomal Toll-like receptor 3 (TLR-3) and the cytoplasmic receptors melanoma differentiation-associated gene 5 (MDA-5) and retinoic acid-inducible gene I (RIG-I). This immunostimulant activity makes Poly I:C a useful vaccine adjuvant and is used in vaccine formulations. Poly I:C and its stabilized analogs (e.g., poly-ICLC) are also being actively researched for their dual role in oncology: directly targeting tumors and acting as immune potentiators. For example Poly I:C can induce apoptosis in tumor cells and stimulate immunogenic cell death and is therefore being explored alongside chemotherapy, radiotherapy, and checkpoint inhibitors, helping to overcome resistance mechanisms and strengthen treatment outcomes. We can supply PolyI:C to all stages of your project - from R&D and preclinical phases right up to GMP commercial manufacture. Contact our team for custom Poly I:C products.<br>For more on poly I:C read out blog 'Poly I:C: A Vaccine Adjuvant With Oncological Potential.'</p>Formule :(C10H13N4O8P)x•(C9H14N3O8P)x•NaxCouleur et forme :White Powder2',3'-O-Isopropylidenecytidine
CAS :<p>2',3'-O-Isopropylidenecytidine is a nucleoside for use in research applications</p>Formule :C12H17N3O5Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :283.28 g/molPolyinosinic acid tripotassium salt
CAS :<p>Polyinosinic acid is a single stranded RNA analog which is combined with polycytidylic acid (poly C) to form a stable duplex structure known as Polyinosinic acid-polycytidylic acid (Poly I:C). PolyI:C stimulates the secretion of pro-inflammatory cytokines and type I interferon through its interaction with endosomal Toll-like receptor 3 (TLR-3) and the cytoplasmic receptors melanoma differentiation-associated gene 5 (MDA-5) and retinoic acid-inducible gene I (RIG-I). This immunostimulant activity makes Poly I:C a useful vaccine adjuvant and is used in vaccine formulations. Poly I:C and its stabilized analogs (e.g., poly-ICLC) are also being actively researched for their dual role in oncology: directly targeting tumors and acting as immune potentiators. For example Poly I:C can induce apoptosis in tumor cells and stimulate immunogenic cell death and is therefore being explored alongside chemotherapy, radiotherapy, and checkpoint inhibitors, helping to overcome resistance mechanisms and strengthen treatment outcomes. We can supply PolyI:C to all stages of your project - from R&D and preclinical phases right up to GMP commercial manufacture. Contact our team for custom Poly I:C products.<br>For more on poly I:C read out blog 'Poly I:C: A Vaccine Adjuvant With Oncological Potential.'</p>Degré de pureté :Min. 95%2-Hydrazinoadenosine
CAS :<p>2-Hydrazinoadenosine is an active analogue of adenosine. It is a potent agonist for the adenosine receptor subtypes A1 and A2A with high affinity. 2-Hydrazinoadenosine has been shown to inhibit cardiac contractility in animal models, as well as to produce hypotension, bradycardia, and bronchodilation in humans. This drug also has a functional effect on the heart by binding to adenosine receptors, which leads to the inhibition of catecholamine release. This drug is used clinically as an antiarrhythmic agent and a vasodilator in coronary artery disease.</p>Formule :C10H15N7O4Degré de pureté :Min. 95%Couleur et forme :PowderMasse moléculaire :297.27 g/mol2'-Phosphoadenosine 5'-phosphosulfate tetralithium salt (mixture with 3'-isomer)
CAS :<p>2'-Phosphoadenosine 5'-phosphosulfate tetralithium salt (mixture with 3'-isomer) is a novel, modified nucleoside. It has antiviral properties and can be used for the treatment of cancer. 2'-Phosphoadenosine 5'-phosphosulfate tetralithium salt (mixture with 3'-isomer) inhibits viral replication by inhibiting the synthesis of viral DNA and RNA. This compound also inhibits cancer cell proliferation by inhibiting deoxyribonucleic acid (DNA) and ribonucleic acid (RNA) synthesis.</p>Formule :C10H11N5O13P2S·4LiDegré de pureté :Min. 95%Couleur et forme :SolidMasse moléculaire :531 g/mol7-Deaza-7-iodoadenosine
CAS :<p>7-Deaza-7-iodoadenosine is a nucleotide that has been used in experiments to assess the levels of adenosine, a dinucleotide phosphate that is involved in many cellular functions. 7-deaza-7-iodoadenosine has been shown to inhibit locomotor activity in rats and cyclase activity in 3T3-L1 preadipocytes. It also inhibits the release of inflammatory proteins from polymorphonuclear leucocytes and angiogenesis (formation of new blood vessels) in liver cells. Although this nucleotide has not been extensively studied, it has been proposed as an antiinflammatory agent because it inhibits protein synthesis and downregulates proinflammatory proteins.</p>Formule :C11H13IN4O4Degré de pureté :Min. 95%Masse moléculaire :392.15 g/molUridine-3',5'-cyclic monophosphate sodium salt
CAS :<p>Uridine-3',5'-cyclic monophosphate sodium salt is a phosphotriester that is an intermediate in the biosynthesis of nucleosides. It is also a phosphodiesterase inhibitor, which means it inhibits the breakdown of cyclic nucleotides and allows them to accumulate. This drug has been shown to increase platelet production and has anti-inflammatory effects. Uridine-3',5'-cyclic monophosphate sodium salt is a human metabolite that can be synthesized from uridine, which is present in DNA, RNA, and food sources such as meat, eggs, and milk. The synthesis of uridine-3',5'-cyclic monophosphate sodium salt requires phosphoramidite as a precursor.</p>Formule :C9H10N2O8P·NaDegré de pureté :Min. 98 Area-%Couleur et forme :White PowderMasse moléculaire :328.2 g/molAbacavir 5'-phosphate
CAS :<p>Abacavir 5'-phosphate is a nucleoside analog that inhibits the replication of the herpes virus by covalently binding to the viral DNA polymerase and blocking its ability to polymerize dNTPs. Abacavir 5'-phosphate's anti-viral potency has been shown in vivo using a model with herpes simplex virus, and it has been shown to inhibit viral replication in cell culture. The drug also reacts with cellular components such as proteins, lipids, and nucleic acids, which may lead to drug reactions. Abacavir 5'-phosphate is chemically stable, so it can be subjected to analytical methods without degradation. It is an analog of zidovudine (AZT).</p>Formule :C14H19N6O4PDegré de pureté :Min. 95%Masse moléculaire :366.31 g/mol3'-Deoxycytidine-5'-triphosphate
CAS :<p>3'-Deoxycytidine-5'-triphosphate is a modified nucleoside that is the precursor for DNA synthesis. It is an activator of deoxyribonucleoside triphosphates, which are needed in the production of DNA. 3'-Deoxycytidine-5'-triphosphate has been shown to be active against cancer cells and antiviral agents. This chemical also inhibits viral RNA synthesis by blocking the conversion of ribonucleotides to deoxyribonucleotides. 3'-Deoxycytidine-5'-triphosphate is novel and high purity, with a CAS number 69383-05-7.</p>Degré de pureté :Min. 95%Masse moléculaire :467.1 g/mol2’-Deoxy-N2-DMF-2’-fluoroguanosine
<p>Please enquire for more information about 2’-Deoxy-N2-DMF-2’-fluoroguanosine including the price, delivery time and more detailed product information at the technical inquiry form on this page</p>Formule :C13H17FN6O4Degré de pureté :Min. 95%Masse moléculaire :340.31 g/mol
