Chemical identity

Topiramate EP Impurity B

CAS 876403-98-4 · C17H30N2O9S

01Identity

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

Lazychem IDLC-29889
PubChem CID16655600
NameTopiramate EP Impurity B
CAS RN876403-98-4
Molecular formulaC17H30N2O9S
Molecular weight438.49 g/mol
IUPAC name2,3:4,5-bis-O-(propan-2,2-diyl)-β-D-fructopyranose 1-[N-(diethylcarbamoyl)sulfamate]
InChIKeyACYUMNAWFQMILA-FJZAXULXSA-N

02Structure identifiers

2D structurePubChem CID 16655600
Two-dimensional chemical structure of Topiramate EP Impurity B, CAS 876403-98-4
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 3 rings, includes aliphatic carbon, has 4 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres4
Unassigned stereocentres0
Ring count3
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCCN(CC)C(=O)NS(=O)(=O)OC[C@]12[C@H]([C@H]3[C@@H](CO1)OC(O3)(C)C)OC(O2)(C)C
InChINot listed
Formula from structureC17H30N2O9S
Molecular weight from structure438.49 g/mol

03Stereochemistry

The published structure contains 4 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres4Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 16Before 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 876403-98-4 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 876403-98-4 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

Topiramate

View API and impurity family

Other names

  • Topiramate Impurity
  • N-(Diethylamino)carbonyl Topiramate
  • 2,3:4,5-Bis-O-(1-methylethylidene)-b-D-fructopyranose 1-[[(diethylamino)carbonyl]sulfamate]
  • 876403-98-4
  • Topiramate EP Impurity B
  • Topiramate Impurity 5
  • 2,3:4,5-Bis-O-(propan-2,2-diyl)-beta-D-fructopyranose 1-[N-(diethylcarbamoyl)sulfamate]
  • 2,3:4,5-Bis-O-(1-methylethylidene)-beta-D-fructopyranose 1-[[(diethylamino)carbonyl]sulfamate]
  • ((3aS,5aR,8aR,8bS)-2,2,7,7-tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran-3a-yl)methyl (diethylcarbamoyl)sulfamate

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