Chemical identity

Rifaximin Inhouse Impurity B

CAS 1351775-04-6 · C43H49N3O11

01Identity

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

Lazychem IDLC-27001
PubChem CID177857543
NameRifaximin Inhouse Impurity B
CAS RN1351775-04-6
Molecular formulaC43H49N3O11
Molecular weight783.86 g/mol
IUPAC name(2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(Acetyloxy)-6,21,23-trihydroxy-27-methoxy-2,4,16,20,22,24,26-heptamethyl-11-methylene-2,7-(epoxypentadeca[1,11,13]trienimino)benzofuro[4,5-e]pyrido[1,2-a]benzimidazole-1,5,15(2H,11H)-trion
InChIKeyAKJHOMQWQPCXMR-GEOWOUTJSA-N

02Structure identifiers

2D structurePubChem CID 177857543
Two-dimensional chemical structure of Rifaximin Inhouse Impurity B, CAS 1351775-04-6
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 6 rings, includes aromatic atoms, includes aliphatic carbon, has 9 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres9
Unassigned stereocentres0
Ring count6
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@H]1/C=C/C=C(\C(=O)N=C2C3=C(C4=C5C(=C(C(=O)C4=C2O)C)O[C@@](C5=O)(O/C=C/[C@@H]([C@H]([C@H]([C@@H]([C@@H]([C@@H]([C@H]1O)C)O)C)OC(=O)C)C)OC)C)NC6=CC(=C)C=CN63)/C
InChINot listed
Formula from structureC43H49N3O11
Molecular weight from structure783.86 g/mol

03Stereochemistry

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

Defined centres9Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 512Before 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.

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.

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 FOUNDCAS 1351775-04-6 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 1351775-04-6 has no exact match in the reviewed SCOMET list.
Review date2026-08-01Recheck the current official instruments for the material, concentration, activity and date in question.

05Names and relationships

Associated parent compound

Rifaximin

View API and impurity family

Other names

  • Rifaximin Impurity 1 / Rifaximin Inhouse Impurity B/ Rifaximin CP Impurity A
  • Rifaximin Impurity 1
  • Rifaximin Inhouse Impurity B
  • Rifaximin CP Impurity A
  • Rifaximin Impurity 2
  • 1351775-03-5
  • IR181353
  • IR181354
  • 1351775-04-6
  • Rifaximin CP Impurity B
  • Rifaximin Impurity 2/ Rifaximin CP Impurity B

Related records from the same parent family

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