16-DESMETHYL-16-(HYDROXYMETHYL)RIFAXIMIN
UNII X5ZC3G20EC

Substance Identification & Data

This profile provides standardized clinical and technical data for 16-desmethyl-16-(hydroxymethyl)rifaximin, uniquely identified by the FDA Unique Ingredient Identifier (UNII) X5ZC3G20EC.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 1210022-90-4 and the RxNorm Concept ID (RxCUI) N/A. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code
X5ZC3G20EC
CAS Registry Number
1210022-90-4
RxNorm Concept ID
N/A

Detailed Substance Profile

Preferred Name
16-DESMETHYL-16-(HYDROXYMETHYL)RIFAXIMIN
Official standardized name for this substance within the FDA UNII nomenclature system.
InChIKey
C43H51N3O12
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
QCTUFZPLJLQLQM-SRVBJRABSA-N
Line notation for describing the chemical structure and connectivity of atoms.
PubChem CID
46927912
Unique identification number in the NCBI database of chemical substances.
Substance Type
chemical
ISO 11238 classification category (e.g., Chemical, Polymer, Protein).
Ingredient Role
c12c3O[C@](C1=O)(C)O\C=C\[C@@H]([C@H]([C@H]([C@@H]([C@@H]([C@@H]([C@H]([C@@H](C)/C=C/C=C(\C(Nc4c5n6c(nc5c2c(c(c3C)O)c4O)cc(cc6)C)=O)/CO)O)C)O)C)OC(=O)C)C)OC

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for 16-desmethyl-16-(hydroxymethyl)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.

Common Names & Synonyms

16-DESMETHYL-16-(HYDROXYMETHYL)RIFAXIMIN
RIFAXIMIN IMPURITY H [EP IMPURITY]

Systematic Nomenclature

(2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(ACETYLOXY)-5,6,21,23-TETRAHYDROXY-16-(HYDROXYMETHYL)-27-METHOXY-2,4,11,20,22,24,26-HEPTAMETHYL-2,7-(EPOXYPENTADECA(1,11,13)TRIENIMINO)BENZOFURO(4,5-E)PYRIDO(1,2-A)BENZIMIDAZOLE-1,15(2H)-DIONE
(2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-5,6,21,23-TETRAHYDROXY-16-(HYDROXYMETHYL)-27-METHOXY-2,4,11,20,22,24,26-HEPTAMETHYL-1,15-DIOXO-1,2-DIHYDRO2,7-(EPOXYPENTADECA(1,11,13)TRIENOIMINO)(1)BENZOFURO(4,5-E)PYRIDO(1,2-A)BENZIMIDAZOL-25-YL ACETATE (16-DESMETHYL-16-(HYDROXYMETHYL)RIFAXIMIN)
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-16-(HYDROXYMETHYL)-27-METHOXY-2,4,11,20,22,24,26-HEPTAMETHYL-, (2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-

External Clinical & Regulatory Resources

CAS
Common Chemistry
NCATS
Inxight Drugs
NLM
DailyMed Products
NCATS
GSRS Full Record
NLM
PubChem Compound