Chemical Component Summary

Identifiers (8R,9S,13S,14S,17S)-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthrene-3,17-diol
Formula C18 H24 O2
Molecular Weight 272.382  g/mol
Isomeric SMILES C[C@]12CC[C@H]3[C@@H](CCc4cc(O)ccc34)[C@@H]1CC[C@@H]2O
InChI InChI=1S/C18H24O2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h3,5,10,14-17,19-20H,2,4,6-9H2,1H3/t14-,15-,16+,17+,18+/m1/s1

Chemical Details

Formal Charge 0
Atom Count 44
Chiral Atom Count 5
Chiral Atoms C13 C14 C17 C8 C9
Bond Count 47
Aromatic Bond Count 6
Leaving Atoms n/a

Drug Info: DrugBank

DrugBank ID DB00783   (Stereoisomeric match)
Name Estradiol
  • approved
  • investigational
Description Generally refers to the 17-beta-isomer of estradiol, an aromatized C18 steroid with hydroxyl group at 3-beta- and 17-beta-position. Estradiol-17-beta is the most potent form of mammalian estrogenic steroids. In humans, it is produced primarily by the cyclic ovaries and the placenta. It is also produced by the adipose tissue of men and postmenopausal women. The 17-alpha-isomer of estradiol binds weakly to estrogen receptors (receptors, estrogen) and exhibits little estrogenic activity in estrogen-responsive tissues. Various isomers can be synthesized. [PubChem]
  • (17beta)-Estra-1,3,5(10)-triene-3,17-diol
  • 17beta Oestradiol
  • 17beta-Estra-1,3,5(10)-triene-3,17-diol
  • 17beta-Oestradiol
  • Benzhormovarine
  • (17beta)-Estra-1,3,5(10)-triene-3,17-diol
  • 17beta Oestradiol
  • 17beta-Estra-1,3,5(10)-triene-3,17-diol
  • 17beta-Oestradiol
  • Benzhormovarine
Brand Names
  • Activella
  • Activelle
  • Activelle Ld
  • Alora
  • Angeliq
Affected Organism Humans and other mammals
Indication For the treatment of urogenital symptoms associated with post-menopausal atrophy of the vagina (such as dryness, burning, pruritus and dyspareunia) and/or the lower urinary tract (urinary urgency and dysuria).
Pharmacology Estradiol, the principal intracellular human estrogen, is substantially more active than its metabolites, estrone and estriol, at the cellular level.
Mechanism of action Estradiol enters target cells freely (e.g., female organs, breasts, hypothalamus, pituitary) and interacts with a target cell receptor. When the estrogen receptor has bound its ligand it can enter the nucleus of the target cell, and regulate gene transcription which leads to formation of messenger RNA. The mRNA interacts with ribosomes to produce specific proteins that express the effect of estradiol upon the target cell. Estrogens increase the hepatic synthesis of sex hormone binding globulin (SHBG), thyroid-binding globulin (TBG), and other serum proteins and suppress follicle-stimulating hormone (FSH) from the anterior pituitary.
Route of administration
  • intramuscular
  • oral
  • oral; transdermal
  • topical
  • transdermal
  • Estrogens
  • Contraceptive Agents
  • Anti-menopausal Agents
ATC-Code G03CA03
AHFS-Code 68:16.04
CAS number 50-28-2
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