ent-Entecavir
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MedKoo CAT#: 555901

CAS#: 188399-46-4 (enantiomer)

Description: ent-Entecavir is an enantiomeric impurity of the antiviral drug Entecavir. Entecavir is an oral antiviral drug used in the treatment of hepatitis B virus (HBV) infection. Entecavir is a reverse transcriptase inhibitor. It prevents the hepatitis B virus from multiplying and reduces the amount of virus in the body. More specifically, it is a deoxyguanosine analogue belonging to a class of carbocyclic nucleosides, that inhibits reverse transcription, DNA replication and transcription in the viral replication process.


Chemical Structure

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ent-Entecavir
CAS# 188399-46-4 (enantiomer)

Theoretical Analysis

MedKoo Cat#: 555901
Name: ent-Entecavir
CAS#: 188399-46-4 (enantiomer)
Chemical Formula: C12H15N5O3
Exact Mass: 277.12
Molecular Weight: 277.284
Elemental Analysis: C, 51.98; H, 5.45; N, 25.26; O, 17.31

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1mg USD 550 2 Weeks
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Related CAS #: 142217-69-4 (free)   209216-23-9 (hydrate)   911138-73-3 (maleate)   188399-46-4 (enantiomer)    

Synonym: ent-Entecavir, ent-BMS 200475; ent-BMS-200475; ent-BMS200475; ent-Baraclude; ent-SQ 34676; ent-SQ-34676; ent-SQ34676; FT-0083013; FT0083013; FT0083013; D07896;

IUPAC/Chemical Name: 2-Amino-1,9-dihydro-9-[(1R,3S,4R)-4-hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl]-6H-Purin-6-one

InChi Key: QDGZDCVAUDNJFG-BWZBUEFSSA-N

InChi Code: InChI=1S/C12H15N5O3/c1-5-6(3-18)8(19)2-7(5)17-4-14-9-10(17)15-12(13)16-11(9)20/h4,6-8,18-19H,1-3H2,(H3,13,15,16,20)/t6-,7-,8-/m1/s1

SMILES Code: O=C1NC(N)=NC2=C1N=CN2[C@H]3C([C@@H](CO)[C@H](O)C3)=C

Appearance: Solid powder

Purity: >98% (or refer to the Certificate of Analysis)

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

More Info:

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 277.28 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
In vitro protocol:
In vivo protocol:

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9: Wani MA, Sodhi JS, Yatoo GN, Shah A, Geelani S, Zargar SA, Gulzar GM, Khan M, Aziz SA. Clinical Profile and Efficacy of Antivirals in Hepatitis B Virus Reactivation, in Patients With Cancer Receiving Chemotherapy. J Clin Exp Hepatol. 2020 Nov-Dec;10(6):590-598. doi: 10.1016/j.jceh.2020.06.008. Epub 2020 Jul 8. PMID: 33311896; PMCID: PMC7719970.


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18: Luo M, Wu S, Kalkeri R, Ptak RG, Zhou T, Van Mellaert L, Wang C, Dumbre SG, Block T, Groaz E, De Jonghe S, Li Y, Herdewijn P. Scalable Synthesis, In Vitro cccDNA Reduction, and In Vivo Antihepatitis B Virus Activity of a Phosphonomethoxydeoxythreosyl Adenine Prodrug. J Med Chem. 2020 Nov 25;63(22):13851-13860. doi: 10.1021/acs.jmedchem.0c01381. Epub 2020 Nov 16. PMID: 33191744.


19: Mak LY, Cloherty G, Wong DK, Gersch J, Seto WK, Fung J, Yuen MF. HBV RNA profiles in chronic hepatitis B patients under different disease phases and anti-viral therapy. Hepatology. 2020 Nov 6. doi: 10.1002/hep.31616. Epub ahead of print. PMID: 33159329.


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