
Chemical identity
Tiamulin EP Impurity A / Mutilin
CAS 6040-37-5 · C20H32O3
01Identity
Identifiers and names for this exact compound. Empty fields are left unassigned.
| Lazychem ID | LC-29525 |
|---|---|
| PubChem CID | 66860774 |
| Name | Tiamulin EP Impurity A / Mutilin |
| CAS RN | 6040-37-5 |
| Molecular formula | C20H32O3 |
| Molecular weight | 320.47 g/mol |
| IUPAC name | (3aS,4R,5S,6S,8R,9R,9aR,10R)-6-ethenyl-5,8-dihydroxy- 4,6,9,10-tetramethyloctahydro-3a,9-propano-3aHcyclopentacycloocten- 1(4H)-one |
| InChIKey | OBUUFWIMEGVAQS-JAFVRLMVSA-N |
02Structure identifiers

The parsed structure contains 3 rings, includes aliphatic carbon, has 8 defined stereocentres. These statements are calculated from the published structure string.
| Defined stereocentres | 8 |
|---|---|
| Unassigned stereocentres | 0 |
| Ring count | 3 |
| Secondary amines | 0 |
| Tertiary amines | 0 |
| N-methyl amine sites | 0 |
| SMILES | C[C@@H]1CC[C@@]23CCC(=O)[C@H]2[C@@]1([C@@H](C[C@@]([C@H]([C@@H]3C)O)(C)C=C)O)C |
|---|---|
| InChI | Not listed |
| Formula from structure | C20H32O3 |
| Molecular weight from structure | 320.47 g/mol |
03Stereochemistry
The published structure contains 8 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.
Published same-connectivity configurations
2 recordsThese records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.


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 | NO EXACT MATCH FOUND | CAS 6040-37-5 has no exact match in the reviewed published schedule. |
|---|---|---|
| SCOMET | NO EXACT REVIEWED CAS MATCH | CAS 6040-37-5 has no exact match in the reviewed SCOMET list. |
| Review date | 2026-08-01 | Recheck the current official instruments for the material, concentration, activity and date in question. |
- Narcotic Drugs and Psychotropic Substances Act, 1985, ScheduleDepartment of Revenue, Government of India · reviewed 2026-08-01
- Controlled-substances notifications and amendmentsDepartment of Revenue, Government of India · reviewed 2026-08-01
- Appendix 3, SCOMET ListDirectorate General of Foreign Trade, Government of India · reviewed 2026-08-01
05Names and relationships
Associated parent compound
Tiamulin
View API and impurity familyOther names
- Tiamulin EP Impurity A
- Mutilin
- 6040-37-5
- 22KM7GR3SJ
- RefChem:160212
- (1S,2R,3S,4S,6R,7R,8R,14R)-4-ethenyl-3,6-dihydroxy-2,4,7,14-tetramethyltricyclo[5.4.3.01,8]tetradecan-9-one
- (3aS,4R,5S,6S,8R,9R,9aR,10R)-6-Ethenyl-5,8-dihydroxy-4,6,9,10-tetramethyloctahydro-3a,9-propano-3aH-cyclopentacycloocten-1(4H)-one (Mutilin)
- Tiamulin Hydrogen Fumarate Imp. A (EP)
- Tiamulin Imp. A (EP)
- (3aS,4R,5S,6S,8R,9R,9aR,10R)-6-Ethenyl-5,8-dihydroxy-4,6,9,10-tetramethyloctahydro-3a,9-propano-3aH-cyclopentacycloocten-1(4H)-one
- Tiamulin Hydrogen Fumarate Impurity A
- Tiamulin Impurity A
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 66860774
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.
