Tiamulin Fumarate API

01API identity and structure

2D structure: Tiamulin Fumarate, CAS 55297-96-6 — Structure of Tiamulin Fumarate (CAS 55297-96-6). LazyChem record. Source identity: PubChem CID 23725049. Confirm the identifiers before analytical use.Download structure image

API / medicine name	Tiamulin Fumarate
CAS RN	55297-96-6
PubChem CID	23725049
Molecular formula	C32H51NO8S
Molecular weight	609.8 g/mol
IUPAC name	(E)-but-2-enedioic acid;[(1S,2R,3S,4S,6R,7R,8R,14R)-4-ethenyl-3-hydroxy-2,4,7,14-tetramethyl-9-oxo-6-tricyclo[5.4.3.01,8]tetradecanyl] 2-[2-(diethylamino)ethylsulfanyl]acetate
Defined stereocentres	8
Unassigned stereocentres	0

SMILES	CCN(CC)CCSCC(=O)O[C@@H]1C[C@@]([C@H]([C@@H]([C@@]23CC[C@H]([C@@]1([C@@H]2C(=O)CC3)C)C)C)O)(C)C=C.C(=C/C(=O)O)\C(=O)O
InChI	Not listed
InChIKey	YXQXDXAHCSEVSD-GCYNEOGWSA-N

02Stereochemistry

The published structure contains 8 defined and 0 unassigned tetrahedral stereocentres. The exact wedge-and-dash depiction is shown above.

Defined stereocentres82D structure

Unassigned stereocentres02D structure

Assignment statusFully assignedExact published identity

Tetrahedral upper bound≤ 256Before symmetry reduction

Published same-connectivity configurations

1 record

These records have the same connectivity, molecular formula and protonation layer, but a different complete InChIKey stereochemical layer. Only separately structure-linked records are shown.

Tiamulin Fumarate

CAS 55297-96-6

YXQXDXAHCSEVSD-GCYNEOGWSA-N

Current configuration

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.

03Structural nitrosamine screen

Record-level resultNo candidate is published

No record-level structural candidate is currently published for this identity.

This result does not predict manufacturing conditions, formation, analytical findings or absence of risk. A process-specific assessment is required.

04India status for this compound

The result below applies only to this exact compound identity and CAS number.

NDPS / RCS	NOT FOUND IN REVIEWED ENTRIES	No exact reviewed identity entry was found. Generic, class, analogue, salt and isomer provisions were not evaluated. Confirm the current official schedule before a regulatory decision.
SCOMET	NOT FOUND IN REVIEWED CAS ENTRIES	CAS 55297-96-6 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

Records whose supplied identity data explicitly associates them with Tiamulin Fumarate. Each link opens the exact chemical identity page. A PubChem impurity label is not treated as an official pharmacopoeial designation unless an exact reviewed source states it.

No separate impurity or related-compound record is linked to this exact API identity.

06Sources

S01
PubChem compound record, CID 23725049
Structure, identifiers and machine-readable properties for the API identity.
S02
NCBI website and molecular data policies
Reuse policy for NCBI molecular data. Vendor descriptions and contributed narrative text are not reproduced.
S03
Lazychem chemical records
Parent-family links use the supplied parent identity.