
Chemical identity
Androsta-3,5-dien-17-one
CAS 1912-63-6 · C19H26O
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-04488 |
|---|---|
| PubChem CID | 15383327 |
| Name | Androsta-3,5-dien-17-one |
| CAS RN | 1912-63-6 |
| Molecular formula | C19H26O |
| Molecular weight | 270.42 g/mol |
| IUPAC name | (8R,9S,10R,13S,14S)-10,13-dimethyl-7,8,9,10,11,12,13,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-17(2H)-one |
| InChIKey | NINLAYUXSUKKHW-QAGGRKNESA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C19H26O |
|---|---|
| InChIKey | NINLAYUXSUKKHW-QAGGRKNESA-N |
| Ring count | 4 |
| Defined stereocentres | 5 |
| Unassigned stereocentres | 0 |
| SMILES | C[C@]12CC[C@H]3[C@H]([C@@H]1CCC2=O)CC=C4[C@@]3(CCC=C4)C |
|---|---|
| InChI | InChI=1S/C19H26O/c1-18-11-4-3-5-13(18)6-7-14-15-8-9-17(20)19(15,2)12-10-16(14)18/h3,5-6,14-16H,4,7-12H2,1-2H3/t14-,15-,16-,18-,19-/m0/s1 |
03Stereochemistry
The published structure contains 5 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 1912-63-6 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 1912-63-6 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
Abiraterone
View API and impurity familyOther names
- Abiraterone Impurity 23
- (8R,9S,10R,13S,14S)-10,13-dimethyl-1,2,7,8,9,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-17-one
- 3,5-Androstandien-17-one
- 3,5-androstadien-17-one
- NINLAYUXSUKKHW-QAGGRKNESA-N
- (8R,9S,10R,13S,14S)-10,13-dimethyl-1,2,7,8,9,10,11,12,13,14,15,16-dodecahydro-17H-cyclopenta[a]phenanthren-17-one
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 15383327
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.
