Chemical identity

Topiramate TP 2 Impurity / (3aR,5aR,8aR,8bS)-3a-(chloromethyl)-2,2,7,7-tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran

CAS 32785-90-3 · C12H19ClO5

01Identity

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

Lazychem IDLC-29896
PubChem CID168450788
NameTopiramate TP 2 Impurity / (3aR,5aR,8aR,8bS)-3a-(chloromethyl)-2,2,7,7-tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran
CAS RN32785-90-3
Molecular formulaC12H19ClO5
Molecular weight278.73 g/mol
IUPAC name(3aR,5aR,8aR,8bS)-3a-(chloromethyl)-2,2,7,7-tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran
InChIKeyJPOKXWDHLOMNQX-XBWDGYHZSA-N

02Structure identifiers

2D structurePubChem CID 168450788
Two-dimensional chemical structure of Topiramate TP 2 Impurity / (3aR,5aR,8aR,8bS)-3a-(chloromethyl)-2,2,7,7-tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran, CAS 32785-90-3
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, contains at least one halogen atom. These statements are calculated from the published structure string.

Defined stereocentres4
Unassigned stereocentres0
Ring count3
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC1(O[C@@H]2CO[C@@]3([C@H]([C@@H]2O1)OC(O3)(C)C)CCl)C
InChINot listed
Formula from structureC12H19ClO5
Molecular weight from structure278.73 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 32785-90-3 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 32785-90-3 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

Topiramate

View API and impurity family

Other names

  • (3aR,5aR,8aR,8bS)-3a-(chloromethyl)-2,2,7,7-tetramethyltetrahydro-3aH-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran
  • Topiramate Impurity I
  • D-Fructopiranose Hydrochloride
  • 32785-90-3
  • (3AR,5aR,8aR,8bS)-3a-(chloromethyl)-2,2,7,7-tetramethyltetrahydro-5H-bis([1,3]dioxolo)[4,5-b:4',5'-d]pyran
  • ss-D-Fructopyranose deriv. 5H-Bis[1,3]dioxolo[4,5-b:4',5'-d]pyran
  • 1-Chloro-1-deoxy-2,3:4,5-di-O-isopropylidene-ss-D-fructopyranose

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