Chemical identity

Rifaximin Impurity B

CAS not listed · C39H49NO14

01Identity

Identifiers and names for this exact compound. Empty fields are left unassigned.

Lazychem IDLC-53684
PubChem CID26340
NameRifaximin Impurity B
CAS RNNot listed
Molecular formulaC39H49NO14
Molecular weight755.8 g/mol
IUPAC name2-[(13-acetyloxy-2,15,17,29-tetrahydroxy-11-methoxy-3,7,12,14,16,18,22-heptamethyl-6,23-dioxo-8,30-dioxa-24-azatetracyclo[23.3.1.14,7.05,28]triaconta-1(29),2,4,9,19,21,25,27-octaen-27-yl)oxy]acetic acid
InChIKeySQTCRTQCPJICLD-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 26340
Two-dimensional chemical structure of Rifaximin Impurity B
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 5 rings, includes aromatic atoms, includes aliphatic carbon. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres9
Ring count5
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC1C=CC=C(C(=O)NC2=CC(=C3C(=C2O)C(=C(C4=C3C(=O)C(O4)(OC=CC(C(C(C(C(C(C1O)C)O)C)OC(=O)C)C)OC)C)C)O)OCC(=O)O)C
InChINot listed
Formula from structureC39H49NO14
Molecular weight from structure755.8 g/mol

03Stereochemistry

The published structure contains 0 defined and 9 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres0Structure assigned
Unassigned centres9Structure unspecified
Assignment statusUnassignedExact published identity
Tetrahedral upper bound≤ 512Before symmetry reduction

Published same-connectivity configurations

3 records

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.

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 / RCSNO EXACT MATCH FOUNDNo CAS number is available for an exact comparison.
SCOMETNO EXACT REVIEWED CAS MATCHNo CAS number is available for an exact comparison.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

No parent compound is listed.

Other names

No synonyms are listed.

Related records from the same parent family

No related records are linked by parent name.

06Documented history

Dated discovery, occurrence, use and issue claims are published only when a suitable primary or government source is available.

No dated history available

No verified discovery, first report, occurrence, use or issue event is currently available for this identity.

07Sources