Impurity reference standards
Entecavir impurities & reference standards
Characterised Entecavir impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
28reference materials
1isotope-labelled
COAHPLC · NMR · MS on request
(1S,2S,3S,5S)-3-(Benzyloxy)-5-(6-(benzyloxy)-2-(((4-methoxyphenyl)diphenylmethyl)amino)-9H-purin-9-yl)-2-((benzyloxy)methyl)cyclopentan-1-ol
- CAS
- 142217-78-5
- Formula
- C52H49N5O5
- MW
- 824 g/mol
VQ-025546
(1S,2S,3S,5S)-3-(Benzyloxy)-5-(6-(benzyloxy)-2-(tritylamino)-9H-purin-9-yl)-2-((benzyloxy)methyl)cyclopentan-1-ol
- CAS
- 1345339-53-8
- Formula
- C51H47N5O4
- MW
- 793.97 g/mol
VQ-044108
(1S,2S,3S,5S)-5-(2-Amino-6-(benzyloxy)-9H-purin-9-yl)-3-(benzyloxy)-2-((benzyloxy)methyl)cyclopentan-1-ol
- CAS
- 142217-77-4
- Formula
- C32H33N5O4
- MW
- 551.6 g/mol
VQ-030494
![[1S-(1α,2α,3β,5α)]-3-(Phenylmethoxy)-2-[(phenylmethoxy)methyl]-6-oxabicyclo[3.1.0]hexane chemical structure](/media/structures/YPDRJNPIGFCETD-WCIQWLHISA-N.svg)
[1S-(1α,2α,3β,5α)]-3-(Phenylmethoxy)-2-[(phenylmethoxy)methyl]-6-oxabicyclo[3.1.0]hexane
- CAS
- 110567-22-1
- Formula
- C20H22O3
- MW
- 310.4 g/mol
VQ-025545
2-Amino-9-((1R,3R,4R)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one
- CAS
- 1354695-84-3
- Formula
- C26H27N5O3
- MW
- 457.5 g/mol
VQ-037005
2-Amino-9-((1S,3R,4R)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one
- CAS
- 1354695-85-4
- Formula
- C26H27N5O3
- MW
- 457.5 g/mol
VQ-025544
4-Dehydroxy-4-dimethylhydroxysilyl Entecavir
- CAS
- 870614-82-7
- Formula
- C14H21N5O3Si
- MW
- 335.43 g/mol
VQ-022542
6-(Benzyloxy)-9-((1S,3R,4S)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-N-((4-methoxyphenyl)diphenylmethyl)-9H-purin-2-amine
- CAS
- 142217-80-9
- Formula
- C53H49N5O4
- MW
- 820 g/mol
VQ-030497
6-(Benzyloxy)-9-((1S,3R,4S)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-N-trityl-9H-purin-2-amine
- CAS
- 1661867-19-1
- Formula
- C52H47N5O3
- MW
- 790 g/mol
VQ-044107
FAQs — Entecavir impurities
Which Entecavir impurities do you supply?
We list 28 Entecavir-related reference materials, including process impurities, degradation products, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Entecavir impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Entecavir impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Entecavir impurity standards
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