
Chemical identity
N-Despropyl Pergolide
CAS 72821-91-1 · C16H20N2S
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-21248 |
|---|---|
| PubChem CID | 9970488 |
| Name | N-Despropyl Pergolide |
| CAS RN | 72821-91-1 |
| Molecular formula | C16H20N2S |
| Molecular weight | 272.41 g/mol |
| IUPAC name | (6aR,9R,10aR)-9-(Methylsulfanylmethyl)-4,6,6a,7,8,9,10,10a-octahydroindolo[4,3-fg]quinoline |
| InChIKey | BHDLEAVQICQCHC-WDBKCZKBSA-N |
02Structure identifiers

Structure facts for this exact identity.
| Molecular formula | C16H20N2S |
|---|---|
| InChIKey | BHDLEAVQICQCHC-WDBKCZKBSA-N |
| Ring count | 4 |
| Defined stereocentres | 3 |
| Unassigned stereocentres | 0 |
| SMILES | CSC[C@@H]1C[C@H]2[C@@H](CC3=CNC4=CC=CC2=C34)NC1 |
|---|---|
| InChI | InChI=1S/C16H20N2S/c1-19-9-10-5-13-12-3-2-4-14-16(12)11(8-18-14)6-15(13)17-7-10/h2-4,8,10,13,15,17-18H,5-7,9H2,1H3/t10-,13-,15-/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.
04Possible N-nitroso structures
A record-level structural review indicates a possible N-nitroso candidate. This is not a confirmed impurity, formation prediction or analytical finding.
A structural result alone does not establish that a nitrosamine forms. A process-specific and analytical assessment is required.
05India 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 72821-91-1 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 72821-91-1 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
06Names and relationships
Associated parent compound
Pergolide
View API and impurity familyOther names
- (2R, 4R, 7R)-4-[(methylsulfanyl)methyl]-6, 11-diazatetracyclo[7.6.1.0?, ?.0??, ??]hexadeca-1(15), 9, 12(16), 13-tetraene
07Documented 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.
08Sources
- S01PubChem compound record, CID 9970488
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.
