topterone topterone topterone (inn, usan) (developmental code name win-17665), also known as 17α-propyltestosterone (or simply propyltestosterone) or as 17α-propylandrost-4-en-17β-ol-3-one, is a steroidal antiandrogen that was first reported in 1978 and was developed for topical administration but, due to poor effectiveness, was never marketed. topteroneclinical dataother nameswin-17665; propyltestosterone; 17α-propyltestosterone; 17α-propylandrost-4-en-17β-ol-3-oneroutes ofadministrationtopicalidentifiers iupac name (8r,9s,10r,13s,14s,17s)-17-hydroxy-10,13-dimethyl-17-propyl-2,6,7,8,9,11,12,14,15,16-decahydro-1h-cyclopentaphenanthren-3-one cas number60607-35-4pubchem cid9797605chemspider39526unii77wpb17zk1comptox dashboard (epa)dtxsid20209417 echa infocard100.056.638 chemical and physical dataformulac22h34o2molar mass330.512 g·mol−13d model (jsmol)interactive image smiles cccc1(ccc2c1(ccc3c2ccc4=cc(=o)ccc34c)c)o inchi inchi=1s/c22h34o2/c1-4-10-22(24)13-9-19-17-6-5-15-14-16(23)7-11-20(15,2)18(17)8-12-21(19,22)3/h14,17-19,24h,4-13h2,1-3h3/t17-,18+,19+,20+,21+,22+/m1/s1key:lzsoohlazhothj-guclmqhlsa-n