Chemical identity

Rifaximin EP Impurity F/ Rifaximin BP Impurity F/ Rifamycin O (Free Base)

CAS 14487-05-9 · C39H47NO14

01Identity

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

Lazychem IDLC-26998
PubChem CID5280468
NameRifaximin EP Impurity F/ Rifaximin BP Impurity F/ Rifamycin O (Free Base)
CAS RN14487-05-9
Molecular formulaC39H47NO14
Molecular weight753.79 g/mol
IUPAC name4-O-(Carboxymethyl)-1-deoxy-1,4-dihydro-4-hydroxy-1-oxo-rifamycin γ-lactone
InChIKeyRAFHKEAPVIWLJC-KQOHHTLASA-N

02Structure identifiers

2D structurePubChem CID 5280468
Two-dimensional chemical structure of Rifaximin EP Impurity F/ Rifaximin BP Impurity F/ Rifamycin O (Free Base), CAS 14487-05-9
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 stereocentres1
Ring count6
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@H]1/C=C/C=C(\C(=O)NC2=CC3(C4=C(C2=O)C(=C(C5=C4C(=O)[C@](O5)(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)C)O)OCC(=O)O3)/C
InChINot listed
Formula from structureC39H47NO14
Molecular weight from structure753.79 g/mol

03Stereochemistry

The published structure contains 9 defined and 1 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres9Structure assigned
Unassigned centres1Structure unspecified
Assignment statusPartially assignedExact published identity
Tetrahedral upper bound≤ 1,024Before 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 FOUNDCAS 14487-05-9 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 14487-05-9 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; Rifamycin

View API and impurity family

Other names

  • Rifaximin EP Impurity F / Rifaximin BP Impurity F
  • Rifaximin EP Impurity F
  • Rifamycin, 4-O-(carboxymethyl)-1-deoxy-1,4-dihydro-4-hydroxy-1-oxo-, gamma-lactone
  • Rifaximin BP Impurity F
  • Rifamycin O

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