oxogestone oxogestone oxogestone (inn), also known as 20β-hydroxy-19-norprogesterone, is a progestin of the 19-norprogesterone group which was synthesized in 1953 and was developed as an injectable hormonal contraceptive in the early 1970s but was never marketed. a c20β phenylpropionate derivative, oxogestone phenpropionate, also exists. oxogestoneclinical dataother namesoxagestone; oxagesterone; oxogesterone; 20β-hydroxy-19-norprogesterone; (20r)-20-hydroxy-19-norpregn-4-en-3-oneidentifiers iupac name (8r,9s,10r,13s,14s,17s)-17--13-methyl-2,6,7,8,9,10,11,12,14,15,16,17-dodecahydro-1h-cyclopentaphenanthren-3-one cas number3643-00-3pubchem cid19275chemspider18186uniia98264fu0ccomptox dashboard (epa)dtxsid70189952 chemical and physical dataformulac20h30o2molar mass302.458 g·mol−13d model (jsmol)interactive image smiles cc(c1ccc2c1(ccc3c2ccc4=cc(=o)ccc34)c)o inchi inchi=1s/c20h30o2/c1-12(21)18-7-8-19-17-5-3-13-11-14(22)4-6-15(13)16(17)9-10-20(18,19)2/h11-12,15-19,21h,3-10h2,1-2h3/t12-,15+,16-,17-,18-,19+,20-/m1/s1key:cnognhfpibored-jikcgybysa-n