Chemical identity

Tretinoin EP Impurity F (Free Base) / rac-4-Methoxytretinoin

CAS 81121-20-2 · C21H30O3

01Identity

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

Lazychem IDLC-30079
PubChem CID46782171
NameTretinoin EP Impurity F (Free Base) / rac-4-Methoxytretinoin
CAS RN81121-20-2
Molecular formulaC21H30O3
Molecular weight330.46 g/mol
IUPAC name(2E,4E,6E,8E)-9-[(3RS)-3-methoxy-2,6,6-trimethylcyclohex-1-enyl]-3,7-dimethylnona-2,4,6,8-tetraenoic acid
InChIKeyKZKUSKHEEFFSTO-XPSLGPGOSA-N

02Structure identifiers

2D structurePubChem CID 46782171
Two-dimensional chemical structure of Tretinoin EP Impurity F (Free Base) / rac-4-Methoxytretinoin, CAS 81121-20-2
Two-dimensional structure for the PubChem identity linked to this record. Confirm the identifiers before analytical use.

The parsed structure contains 1 ring, includes aliphatic carbon. These statements are calculated from the published structure string.

Defined stereocentres0
Unassigned stereocentres1
Ring count1
Secondary amines0
Tertiary amines0
N-methyl amine sites0
SMILESCC1=C(C(CCC1OC)(C)C)/C=C/C(=C/C=C/C(=C/C(=O)O)/C)/C
InChINot listed
Formula from structureC21H30O3
Molecular weight from structure330.46 g/mol

03Stereochemistry

The published structure contains 0 defined and 1 unassigned tetrahedral stereocentre. The exact wedge and dash depiction is shown above.

Defined centres0Structure assigned
Unassigned centres1Structure unspecified
Assignment statusUnassignedExact published identity
Tetrahedral upper bound≤ 2Before 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 81121-20-2 has no exact match in the reviewed published schedule.
SCOMETNO EXACT REVIEWED CAS MATCHCAS 81121-20-2 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

Tretinoin

View API and impurity family

Other names

  • Tretinoin EP Impurity F (Free Base)
  • rac-4-Methoxytretinoin
  • 9-(3-methoxy-2, 6, 6-trimethylcyclohexen-1-yl)-3, 7-dimethylnona-2, 4, 6, 8-tetraenoic acid

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