Sodium 17α-dihydroequilin sulfate

17α-Dihydroequilin

Clinical data
Routes of administration	Oral
ATC code	G03CA57 (WHO)
Identifiers
IUPAC name (9S,13S,14S,17R)-13-methyl-6,9,11,12,14,15,16,17-octahydrocyclopenta[a]phenanthrene-3,17-diol
CAS Number	651-55-8
PubChem CID	9547222
ChemSpider	7826162
UNII	48P73794OJ
Chemical and physical data
Formula	C18H22O2
Molar mass	270.36608 g/mol
3D model (Jmol)	Interactive image
SMILES CC12CCC3C(=CCC4=C3C=CC(=C4)O)C1CCC2O
InChI InChI=1S/C18H22O2/c1-18-9-8-14-13-5-3-12(19)10-11(13)2-4-15(14)16(18)6-7-17(18)20/h3-5,10,14,16-17,19-20H,2,6-9H2,1H3/t14-,16+,17-,18+/m1/s1 Key:NLLMJANWPUQQTA-SPUZQDLCSA-N

17α-Dihydroequilin, or α-dihydroequilin, also known as 7-dehydro-17α-estradiol, as well as estra-1,3,5(10),7-tetraen-3,17α-diol, is a naturally occurring, steroidal estrogen found in horses that is closely related to equilin, equilenin, and 17α-estradiol. The compound, as the 3-sulfate ester sodium salt, is present in conjugated equine estrogens (Premarin), a pharmaceutical extract of the urine of pregnant mares, and is the third highest quantity constituent in the formulation (13.8%).