Chemical identity

Norethindrone EP Impurity B / Norandrostenedione / Norethindrone Related Compound B

CAS 734-32-7 · C18H24O2

01Identity

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

Lazychem IDLC-23706
PubChem CID92834
NameNorethindrone EP Impurity B / Norandrostenedione / Norethindrone Related Compound B
CAS RN734-32-7
Molecular formulaC18H24O2
Molecular weight272.4 g/mol
IUPAC nameEstr-4-ene-3,17-dione
InChIKeyJRIZOGLBRPZBLQ-QXUSFIETSA-N

02Structure identifiers

2D structurePubChem CID 92834
Two-dimensional chemical structure of Norethindrone EP Impurity B / Norandrostenedione / Norethindrone Related Compound B, CAS 734-32-7
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, has 5 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres5
Unassigned stereocentres0
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@]12CC[C@H]3[C@H]([C@@H]1CCC2=O)CCC4=CC(=O)CC[C@H]34
InChINot listed
Formula from structureC18H24O2
Molecular weight from structure272.4 g/mol

03Stereochemistry

The published structure contains 5 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres5Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 32Before symmetry reduction

Published same-connectivity configurations

2 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 734-32-7 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 734-32-7 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

Norethindrone

View API and impurity family

Other names

  • Norethindrone EP Impurity B
  • Norandrostenedione
  • Norethindrone Related Compound B
  • Norethisterone Acetate Impurity J
  • Norethisterone Imp. B (EP)
  • Norethisterone Acetate Imp. J (EP)
  • 19-Norandrost-4-ene-3,17-dione, Estr-4-ene-3,17-dione
  • (+)-Estr-4-ene-3,17-dione
  • 19-Norandrostenedione
  • 734-32-7
  • 19-Norandrost-4-ene-3,17-dione
  • 19-nor-4-androstene-3,17-dione

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