RIFAXIMIN
UNII L36O5T016N

Substance Identification & Data

This profile provides standardized clinical and technical data for Rifaximin, uniquely identified by the FDA Unique Ingredient Identifier (UNII) L36O5T016N.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 80621-81-4 and the RxNorm Concept ID (RxCUI) 35619. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code

L36O5T016N

CAS Registry Number

80621-81-4

RxNorm Concept ID

35619

Detailed Substance Profile

Preferred Name

RIFAXIMIN

Official standardized name for this substance within the FDA UNII nomenclature system.

Molecular Formula

L36O5T016N

The specific atomic composition represented as a molecular structure string.

InChIKey

C43H51N3O11

International Chemical Identifier digital signature for unique molecular identification.

SMILES String

NZCRJKRKKOLAOJ-XRCRFVBUSA-N

Line notation for describing the chemical structure and connectivity of atoms.

NCI Thesaurus

C61926

National Cancer Institute reference terminology for clinical and research data.

PubChem CID

6436173

Unique identification number in the NCBI database of chemical substances.

INN ID

5244

Sequential identifier assigned via the WHO International Nonproprietary Name program.

USAN ID

EE-33

Identifier assigned by the United States Adopted Names Council.

Substance Type

chemical

ISO 11238 classification category (e.g., Chemical, Polymer, Protein).

Ingredient Role

c1c2n(ccc1C)c3c(n2)c4c5c(c3NC(=O)/C(=C\C=C\[C@@H]([C@H](O)[C@H]([C@H]([C@H]([C@@]([C@@H]([C@H](/C=C/O[C@]6(Oc(c(c5O)C)c4C6=O)C)OC)C)(OC(C)=O)[H])C)O)C)C)/C)O

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for Rifaximin. Identifiers are organized into official regulatory terms, commercial trade names, and technical systematic synonyms used to ensure accurate identification across clinical pharmaceutical databases, regulatory filings, and electronic health records.

FDA Official Name

RIFAXIMIN

Common Names & Synonyms

(2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(ACETYLOXY)-5,6,21,23-TETRAHYDROXY-27-METHOXY-2,4,11,16,20,22,24,26-OCTAMETHYL-2,7-(EPOXYPENTADECA(1,11,13)TRIENIMINO)BENZOFURO(4,5-E)PYRIDO(1,2-A)BENZIMIDAZOLE-1,15(2H)-DIONE

4-DEOXY-4'-METHYLPYRIDO(1',2'-1,2)IMIDAZO(5,4-C)RIFAMYCIN SV

L-105

RIFAMYCIN L 105

RIFAXIDIN

RIFAXIMIN [EP IMPURITY]

RIFAXIMIN [EP MONOGRAPH]

RIFAXIMIN [INN]

RIFAXIMIN [JAN]

RIFAXIMIN [MART.]

RIFAXIMIN [MI]

RIFAXIMIN [ORANGE BOOK]

RIFAXIMIN [USAN]

RIFAXIMIN [VANDF]

RIFAXIMIN [WHO-DD]

Brand / Trade Names

XIFAXSAN

Systematic Nomenclature

2,7-(EPOXYPENTADECA(1,11,13)TRIENIMINO)BENZOFURO(4,5-E)PYRIDO(1,2-A)BENZIMIDAZOLE-1,15(2H)-DIONE, 25-(ACETYLOXY)-5,6,21,23-TETRAHYDROXY-27-METHOXY-2,4,11,16,20,22,24,26-OCTAMETHYL-, (2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-

SYS