Algestone

Algestone
Clinical data
Other names	Dihydroxyprogesterone; DHP; Alfasone; Alphasone; Neo-Alfasol; 16α,17α-Dihydroxyprogesterone; 16α,17α-Dihydroxypregn-4-ene-3,20-dione; Alphasone; Alfasone
Drug class	Progestin; Progestogen
ATC code	None;
Legal status
Legal status	In general: ℞ (Prescription only);
Identifiers
	IUPAC name (8R,9S,10R,13S,14S,16R,17S)-17-acetyl-16,17-dihydroxy-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthren-3-one;
CAS Number	595-77-7;
PubChem CID	11687;
ChemSpider	11196;
UNII	3JEB53B3WT;
ChEBI	CHEBI:763 ;
CompTox Dashboard (EPA)	DTXSID40208200 ;
ECHA InfoCard	100.008.974
Chemical and physical data
Formula	C21H30O4
Molar mass	346.467 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES O=C4\C=C2/[C@]([C@H]1CC[C@@]3([C@@](O)(C(=O)C)[C@H](O)C[C@H]3[C@@H]1CC2)C)(C)CC4;
	InChI InChI=1S/C21H30O4/c1-12(22)21(25)18(24)11-17-15-5-4-13-10-14(23)6-8-19(13,2)16(15)7-9-20(17,21)3/h10,15-18,24-25H,4-9,11H2,1-3H3/t15-,16+,17+,18-,19+,20+,21-/m1/s1; Key:CXDWHYOBSJTRJU-SRWWVFQWSA-N;

Algestone (INNTooltip International Nonproprietary Name), also known as alphasone or alfasone, as well as dihydroxyprogesterone, is a progestin which was never marketed. Another progestin, algestone acetophenide, in contrast, has been marketed as a hormonal contraceptive.