Chemicals and Drugs

Equilin

An estrogenic steroid produced by HORSES. It has a total of four double bonds in the A- and B-ring. High concentration of euilin is found in the URINE of pregnant mares.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

An estrogenic steroid produced by HORSES. It has a total of four double bonds in the A- and B-ring. High concentration of euilin is found in the URINE of pregnant mares.

Chemical Identity

Chemical Information

Molecular Formula
C18H20O2
Molecular Weight
268.3 g/mol
CAS Registry No.
474-86-2
IUPAC Name
(9S,13S,14S)-3-hydroxy-13-methyl-9,11,12,14,15,16-hexahydro-6H-cyclopenta[a]phenanthren-17-one
InChIKey
WKRLQDKEXYKHJB-HFTRVMKXSA-N
SMILES
C[C@]12CC[C@H]3C(=CCC4=C3C=CC(=C4)O)[C@@H]1CCC2=O
MeSH Unique ID
D004857
Source
PubChem CID 223368

MeSH Record

Classification

Related Concepts

Knowledge Graph

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MeSH Record

Aspects Covered

29 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, biosynthesis, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, deficiency, economics, genetics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, physiology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

Indexing Annotation

do not confuse with EQUILENIN

MeSH Record

History Note

91(75); was see under 17-KETOSTEROIDS 1975-90

MeSH Record

Previous Indexing

  • 17-Ketosteroids (1969-1974)
  • Estranes (1973-1974)
  • Hydroxysteroids (1974)

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Equilin. Medical Subject Headings (MeSH). 2026. Unique ID D004857. http://id.nlm.nih.gov/mesh/2026/D004857
  2. Equilin. In: Wikipedia. https://en.wikipedia.org/wiki/Equilin
  3. Equilin. In: Wikidata. https://www.wikidata.org/wiki/Q5384492
  4. Equilin. In: PubChem Compound. CID 223368. https://pubchem.ncbi.nlm.nih.gov/compound/223368