Chemical identity

Ofloxacin Dihydrooxazole Impurity

CAS 2489671-28-3 · C18H20FN3O4

01Identity

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

Lazychem IDLC-23914
PubChem CID151484116
NameOfloxacin Dihydrooxazole Impurity
CAS RN2489671-28-3
Molecular formulaC18H20FN3O4
Molecular weight361.37 g/mol
IUPAC name8-Fluoro-2,2-dimethyl-9-(4-methylpiperazin-1-yl)-6-oxo-2H,6H-oxazolo[5,4,3-ij]quinoline-5-carboxylic acid
InChIKeyPNBXPOGMVOQTCV-UHFFFAOYSA-N

02Structure identifiers

2D structurePubChem CID 151484116
Two-dimensional chemical structure of Ofloxacin Dihydrooxazole Impurity, CAS 2489671-28-3
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

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

Defined stereocentres0
Unassigned stereocentres0
Ring count4
Secondary amines0
Tertiary amines2
N-methyl amine sites1
SMILESO=C(C1=CN2C3=C(C=C(F)C(N4CCN(C)CC4)=C3OC2(C)C)C1=O)O
InChINot listed
Formula from structureC18H20FN3O4
Molecular weight from structure361.37 g/mol

03Possible N-nitroso structures

Shown for structural screening only. These candidates are not confirmed impurities, formation predictions or analytical findings.

Matched amine site1 candidate
Chemical structure of Ofloxacin Dihydrooxazole Impurity with the matched amine site highlighted in amber
Amber identifies the screened atom and adjacent bonds.
Possible structure candidateUnverified identity
First calculated possible N-nitroso structure derived from Ofloxacin Dihydrooxazole Impurity, with the new N-nitroso group highlighted in amber
The new N-N=O atoms and bonds are highlighted. No CAS number or compound name is assigned by this calculation.
Candidate 1Possible N-nitroso structural candidate
Calculated formula
C17H17FN4O5
Candidate SMILES
CC1(C)Oc2c(N3CCN(N=O)CC3)c(F)cc3c(=O)c(C(=O)O)cn1c23

Interpretation: A structural alert alone does not establish that a nitrosamine forms. Evaluate nitrite sources, amine reagents, pH, temperature, process sequence, purge and analytical evidence.

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 2489671-28-3 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 2489671-28-3 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

Ofloxacin

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