ESTRIOL
UNII FB33469R8E

Substance Identification & Data

This profile provides standardized clinical and technical data for Estriol, uniquely identified by the FDA Unique Ingredient Identifier (UNII) FB33469R8E.

Technical mappings include the Chemical Abstracts Service (CAS) Registry Number 50-27-1 and the RxNorm Concept ID (RxCUI) 4094. Explore the sections below for detailed nomenclature and a complete directory of NDC-listed products containing this ingredient.

FDA UNII Code
FB33469R8E
CAS Registry Number
50-27-1
RxNorm Concept ID

Detailed Substance Profile

Preferred Name
ESTRIOL
Official standardized name for this substance within the FDA UNII nomenclature system.
Molecular Formula
FB33469R8E
The specific atomic composition represented as a molecular structure string.
InChIKey
C18H24O3
International Chemical Identifier digital signature for unique molecular identification.
SMILES String
PROQIPRRNZUXQM-ZXXIGWHRSA-N
Line notation for describing the chemical structure and connectivity of atoms.
NCI Thesaurus
National Cancer Institute reference terminology for clinical and research data.
PubChem CID
Unique identification number in the NCBI database of chemical substances.
Substance Type
chemical
ISO 11238 classification category (e.g., Chemical, Polymer, Protein).
Ingredient Role
[C@]12([C@]([C@]3([C@](c4c(cc(cc4)O)CC3)([H])CC1)[H])(C[C@H]([C@@H]2O)O)[H])C

Synonyms and Nomenclature

This section provides a complete list of nomenclature and identifier mappings for Estriol. Identifiers are organized into official regulatory terms, commercial trade names, and technical systematic synonyms used to ensure accurate identification across clinical pharmaceutical databases, regulatory filings, and electronic health records.

Common Names & Synonyms

(16A,17B)-ESTRA-1,3,5(10)-TRIENE-3,16,17-TRIOL
1,3,5-ESTRATRIENE-3B,16A,17B-TRIOL
16.ALPHA.,17.BETA.-ESTRIOL
AACIFEMINE
ESTRIOL
ESTRIOL [EMA EPAR VETERINARY]
ESTRIOL [EP MONOGRAPH]
ESTRIOL [GREEN BOOK]
ESTRIOL [HSDB]
ESTRIOL [JAN]
ESTRIOL [MART.]
ESTRIOL [MI]
ESTRIOL [USP MONOGRAPH]
ESTRIOL [USP-RS]
ESTRIOL [WHO-DD]
TRIHYDROXYESTRIN

Brand / Trade Names

COLPOGYN
INCURIN

Systematic Nomenclature

13.BETA.-METHYL-1,3,5(10)-GONATRIENE-3,16.ALPHA.,17.BETA.-TRIOL
ESTRA-1,3,5(10)-TRIENE-3,16,17-TRIOL, (16.ALPHA.,17.BETA.)-

Technical Codes

16.ALPHA.-HYDROXYESTRADIOL
NSC-12169

NDC Products Containing ESTRIOL

This unique ingredient identifier is listed as an ingredient or substance in the following products in the NDC directory: