Chemical identity

Norethindrone EP Impurity A / Norethindrone 6,7-Dehydro Impurity

CAS 31528-46-8 · C20H24O2

01Identity

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

Lazychem IDLC-23705
PubChem CID22216246
NameNorethindrone EP Impurity A / Norethindrone 6,7-Dehydro Impurity
CAS RN31528-46-8
Molecular formulaC20H24O2
Molecular weight296.4 g/mol
IUPAC name7β-Hydroxy-17α-ethynylestr-4,6-dien-3-one
InChIKeySWNFRSGMYREPFG-XGXHKTLJSA-N

02Structure identifiers

2D structurePubChem CID 22216246
Two-dimensional chemical structure of Norethindrone EP Impurity A / Norethindrone 6,7-Dehydro Impurity, CAS 31528-46-8
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 6 defined stereocentres. These statements are calculated from the published structure string.

Defined stereocentres6
Unassigned stereocentres0
Ring count4
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESC[C@]12CC[C@@H]3[C@H]4CCC(=O)C=C4C=C[C@H]3[C@@H]1CC[C@]2(C#C)O
InChINot listed
Formula from structureC20H24O2
Molecular weight from structure296.4 g/mol

03Stereochemistry

The published structure contains 6 defined and 0 unassigned tetrahedral stereocentres. The exact wedge and dash depiction is shown above.

Defined centres6Structure assigned
Unassigned centres0Structure unspecified
Assignment statusFully assignedExact published identity
Tetrahedral upper bound≤ 64Before 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 31528-46-8 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 31528-46-8 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 A
  • Norethindrone 6, 7-Dehydro Impurity
  • (8R,9S,10R,13S,14S,17R)-17-ethynyl-17-hydroxy-13-methyl-1,2,8,9,10,11,12,14,15,16-decahydrocyclopenta[a]phenanthren-3-one
  • RefChem:405478
  • 608-630-3
  • 31528-46-8
  • 6,7-Dehydro Norethindrone
  • 9Z4TNT6U8T
  • 6,7-Didehydronorethisterone
  • 6(7)-didehydronorethindrone
  • 17-Hydroxy-19-nor-17alpha-pregna-4,6-dien-20-yn-3-one (6,7-Didehydronorethisterone)
  • Norethisterone Imp. A (EP)

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