
Chemical identity
Sofosbuvir Methylene Impurity
CAS 863329-63-9 · C31H25N3O7
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-28293 |
|---|---|
| PubChem CID | 11786168 |
| Name | Sofosbuvir Methylene Impurity |
| CAS RN | 863329-63-9 |
| Molecular formula | C31H25N3O7 |
| Molecular weight | 551.55 g/mol |
| IUPAC name | (2R,3S,5R)-5-(4-Benzamido-2-oxopyrimidin-1(2H)-yl)-2-((benzoyloxy)methyl)-4-methylenetetrahydrofuran-3-yl benzoate |
| InChIKey | GYBGOHQHURYWRS-MAARLIENSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C31H25N3O7 |
|---|---|
| InChIKey | GYBGOHQHURYWRS-MAARLIENSA-N |
| Ring count | 5 |
| Defined stereocentres | 3 |
| Unassigned stereocentres | 0 |
| SMILES | C=C1[C@@H]([C@H](O[C@H]1N2C=CC(=NC2=O)NC(=O)C3=CC=CC=C3)COC(=O)C4=CC=CC=C4)OC(=O)C5=CC=CC=C5 |
|---|---|
| InChI | InChI=1S/C31H25N3O7/c1-20-26(41-30(37)23-15-9-4-10-16-23)24(19-39-29(36)22-13-7-3-8-14-22)40-28(20)34-18-17-25(33-31(34)38)32-27(35)21-11-5-2-6-12-21/h2-18,24,26,28H,1,19H2,(H,32,33,35,38)/t24-,26+,28-/m1/s1 |
03Stereochemistry
The published structure contains 3 defined and 0 unassigned tetrahedral stereocentres. The exact wedge-and-dash depiction is shown above.
Published same-connectivity configurations
1 recordThese records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

No additional structure-linked configuration with the same connectivity is currently present in the LazyChem dataset.
Scope: The mathematical 2^n value is only an upper bound. Symmetry and other stereogenic elements can change the number of distinct stereoisomers. A hypothetical configuration is not published as a compound record without a verified structure identity.
04India status for this compound
These results apply only to this exact compound name and CAS number. Confirm the current official instruments before making a regulatory decision.
| NDPS / RCS | NOT FOUND IN REVIEWED ENTRIES | CAS 863329-63-9 was not found in the reviewed exact-identity entries. Generic, class, analogue, salt and isomer provisions were not evaluated. |
|---|---|---|
| SCOMET | NOT FOUND IN REVIEWED CAS ENTRIES | CAS 863329-63-9 was not found in the reviewed exact-CAS mapping. Generic and analogue entries were not evaluated. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · source version 1985-09-16
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · source version 2026-03-11
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · source version 2024-09-02
05Names and relationships
Associated parent compound
Sofosbuvir
View API and impurity familyOther names
- Sofosbuvir Impurity 4
- N4,3',5'-Tribenzoyl,2'-deoxy-2'-methylene Cytidine
- [(2R,3S,5R)-5-(4-benzamido-2-oxopyrimidin-1-yl)-3-benzoyloxy-4-methylideneoxolan-2-yl]methyl benzoate
- N-Benzoyl-2'-deoxy-2'-methylenecytidine 3',5'-Dibenzoate
- (2R,3S,5R)-5-(4-benzamido-2-oxo-1,2-dihydropyrimidin-1-yl)-2-[(benzoyloxy)methyl]-4-methylideneoxolan-3-yl benzoate
- CS-M2329
- Cytidine, N-benzoyl-2^-deoxy-2^-methylene-,3^,5^-dibenzoate(9CI)
06Documented history
Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.
No verified discovery, first report, occurrence, use or issue event is currently available for this identity.
07Sources
- S01PubChem compound record, CID 11786168
Names and machine-readable chemical identity properties.
- S02NCBI website and molecular data policies
Reuse policy for NCBI molecular data. This page does not reproduce vendor descriptions or contributed narrative text.
- S03Narcotic Drugs and Psychotropic Substances Act, 1985, Schedule
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S04Controlled-substances notifications and amendments
Department of Revenue, Government of India. Used for the exact-compound India status shown on this page.
- S05Appendix 3, SCOMET List
Directorate General of Foreign Trade, Government of India. Used for the exact-compound India status shown on this page.
