Entecavir-(R)-Methylethyl Carboxylic Acid
Impurity reference standard
- CAS number
- 1415118-53-4
- InChIKey
- FJUGOJOVRGQPGT-KATARQTJSA-N
- Molecular formula
- C15H19N5O5
- Molecular weight
- 349.34
- Exact mass
- 349.1386 Da
- Purity
- 95%+
- Storage
- 2℃ ~ 8℃
About Entecavir-(R)-Methylethyl Carboxylic Acid
Entecavir-(R)-Methylethyl Carboxylic Acid is supplied as an analytical reference standard. It is registered under CAS number 1415118-53-4.
The compound is characterised by its molecular formula C15H19N5O5 and a molecular weight of 349.34, with the two-dimensional structure shown above.
Computed from the structure, the compound has a monoisotopic mass of 349.1386 Da, a calculated LogP of -0.53, a topological polar surface area of 153.36 Ų. It presents 5 hydrogen-bond donors and 7 acceptors. The structure carries 4 defined stereocentres, which is relevant wherever a stereochemically defined standard is required. These values are commonly used to anticipate chromatographic retention and to plan ionisation conditions during method development.
Each pack ships with a certificate of analysis reporting purity of 95%+ together with the supporting analytical data — HNMR, MS and HPLC or GC traces — so the material can be released straight into your own QC workflow. Recommended storage: 2℃ ~ 8℃.
Available from stock in milligram to gram quantities; larger or custom synthesis requirements are quoted on request.
Calculated properties
Derived from the two-dimensional structure above using RDKit. Computed values describe the parent structure and are provided as a reference for method development — they are not measured data.
- LogP (Crippen)
- -0.53
- Topological polar surface area
- 153.36 Ų
- Hydrogen bond donors
- 5
- Hydrogen bond acceptors
- 7
- Rotatable bonds
- 5
- Heavy atoms
- 25
- Rings
- 3
- Defined stereocentres
- 4
- Elemental composition
- C 51.57% · H 5.48% · N 20.05% · O 22.90%
Frequently asked questions
What purity does Entecavir-(R)-Methylethyl Carboxylic Acid ship at?
Entecavir-(R)-Methylethyl Carboxylic Acid is supplied at 95%+, as stated on the certificate of analysis issued with each pack.
Does Entecavir-(R)-Methylethyl Carboxylic Acid come with a certificate of analysis?
Yes. Every pack ships with a certificate of analysis plus the supporting analytical data — HNMR, MS and HPLC or GC traces.
How is Entecavir-(R)-Methylethyl Carboxylic Acid uniquely identified?
The InChIKey FJUGOJOVRGQPGT-KATARQTJSA-N identifies the structure unambiguously, so it can be matched against your own registry or a public database.
Is a structure file available for Entecavir-(R)-Methylethyl Carboxylic Acid?
Yes. The two-dimensional structure is drawn on this page from the SMILES record, and the SMILES or a molfile can be supplied on request.
What pack sizes are available for Entecavir-(R)-Methylethyl Carboxylic Acid?
Standard packs run from milligram to gram quantities and ship from stock. Larger or custom synthesis requirements are quoted on request.
How should Entecavir-(R)-Methylethyl Carboxylic Acid be stored?
Recommended storage: 2℃ ~ 8℃.
Need this standard, or a related one?
Send the compound name, CAS number or a structure file — we confirm availability, pack size and lead time, usually within one business day.