Chemical identity

Betamethasone 17-Oxo Impurity

CAS 3109-01-1 · C20H25FO3

01Identity

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

Lazychem IDLC-08086
PubChem CID499992
NameBetamethasone 17-Oxo Impurity
CAS RN3109-01-1
Molecular formulaC20H25FO3
Molecular weight332.41 g/mol
IUPAC name(11β,16β)- 9-Fluoro-11-hydroxy-16-methyl-androsta-1,4-diene-3,17-dione
InChIKeyIZLVPOBNINIXJM-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 499992
Two-dimensional chemical structure of Betamethasone 17-Oxo Impurity, CAS 3109-01-1
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 4 rings, includes aliphatic carbon, contains at least one halogen atom. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres7
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC1CC2C3CCC4=CC(=O)C=CC4(C3(C(CC2(C1=O)C)O)F)C
InChINot listed
Formula from structureC20H25FO3
Molecular weight from structure332.41 g/mol

03Stereochemistry

The published structure contains 0 defined and 7 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres0Structure assigned
Unassigned centres7Structure unspecified
Assignment statusUnassignedExact published identity
Tetrahedral upper bound≤ 128Before symmetry reduction

Published same-connectivity configurations

4 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 3109-01-1 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 3109-01-1 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

Betamethasone

View API and impurity family

Other names

No synonyms are listed.

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