Chemical Component Summary

NameESTRIOL
Synonyms1,3,5(10)-ESTRATRIENE-3,16,17-TRIOL
Identifiers(8R,9S,13S,14S,16R,17R)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,16,17-triol
FormulaC18 H24 O3
Molecular Weight288.381
TypeNON-POLYMER
Isomeric SMILESC[C@]12CC[C@@H]3c4ccc(cc4CC[C@H]3[C@@H]1C[C@H]([C@@H]2O)O)O
InChIInChI=1S/C18H24O3/c1-18-7-6-13-12-5-3-11(19)8-10(12)2-4-14(13)15(18)9-16(20)17(18)21/h3,5,8,13-17,19-21H,2,4,6-7,9H2,1H3/t13-,14-,15+,16-,17+,18+/m1/s1
InChIKeyPROQIPRRNZUXQM-ZXXIGWHRSA-N

Chemical Details

Formal Charge0
Atom Count45
Chiral Atom Count6
Bond Count48
Aromatic Bond Count6

Drug Info: DrugBank

DrugBank IDDB04573 
NameEstriol
Groups
  • vet_approved
  • approved
  • investigational
DescriptionA hydroxylated metabolite of estradiol or estrone that has a hydroxyl group at C3-beta, 16-alpha, and 17-beta position. Estriol is a major urinary estrogen. During pregnancy, large amount of estriol is produced by the placenta. Isomers with inversion of the hydroxyl group or groups are called epiestriol. Though estriol is used as part of the primarily North American phenomenon of bioidentical hormone replacement therapy, it is not approved for use by the FDA or Health Canada. It is however available in the United States by prescription filled only by compounding pharmacies. It has also been approved and marketed throughout Europe and Asia for approximately 40 years for the treatment of post-menopausal hot flashes.
Synonyms
  • 16α-hydroxyestradiol
  • 1,3,5(10)-Estratriene-3,16-alpha,17beta-triol
  • (16α,17β)-estra-1,3,5(10)-triene-3,16,17-triol
  • Oestriol
  • 16alpha-hydroxyestradiol
Brand Names
  • Estro-Life
  • BiEST 2.5 Estrogen Cream (Lavender scented)
  • Estriol 5.0 Cream
  • BiEST 5.0 Estrogen Cream
  • Advanced Formula Estro-Life
IndicationUsed as a test to determine the general health of an unborn fetus.
Categories
  • Estradiol Congeners
  • Estranes
  • Estrenes
  • Estrogens
  • Fused-Ring Compounds
ATC-Code
  • G03CC06
  • G03CA04
CAS number50-27-1

Drug Targets

NameTarget SequencePharmacological ActionActions
Estrogen receptor alphaMTMTLHTKASGMALLHQIQGNELEPLNRPQLKIPLERPLGEVYLDSSKPA...unknownagonist
Estrogen receptor betaMDIKNSPSSLNSPSSYNCSQSILPLEHGSIYIPSSYVDSHHEYPAMTFYS...unknownagonist
Sex hormone-binding globulinMESRGPLATSRLLLLLLLLLLRHTRQGWALRPVLPTQSAHDPPAVHLSNG...unknown
Solute carrier organic anion transporter family member 1A2MGETEKRIETHRIRCLSKLKMFLLAITCAFVSKTLSGSYMNSMLTQIERQ...unknowninhibitor
P-glycoprotein 1MDLEGDRNGGAKKKNFFKLNNKSEKDKKEKKPTVSVFSMFRYSNWLDKLY...unknownsubstrate,inducer
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison T, Liu P, Ly S, Frolkis A, Pon A, Banco K, Mak C, Neveu V, Djoumbou Y, Eisner R, Guo AC, Wishart DS. Nucleic Acids Res. 2011 Jan; 39 (Database issue):D1035-41. | PMID:21059682

Related Resource References

Resource NameReference
Pharos CHEMBL193482
PubChem 5756
ChEMBL CHEMBL193482
ChEBI CHEBI:27974
CCDC/CSD ESTRIO