inocoterone inocoterone inocoterone (inn; developmental code name ru-29294) is a steroid-like nonsteroidal antiandrogen (nsaa) that was never marketed. an acetate ester, inocoterone acetate, shows greater antiandrogen activity and was developed as a topical medication for the treatment of acne but showed only modest effectiveness in clinical trials and similarly was never marketed. inocoteroneclinical dataother namesru-29294; 2,5-seco-a-dinorestr-9-en-17β-ol-5-oneroutes ofadministrationtopicaldrug classnonsteroidal antiandrogenidentifiers iupac name (3s,3as,9as,9bs)-6-ethyl-3-hydroxy-3a-methyl-2,3,4,5,8,9,9a,9b-octahydro-1h-cyclopentanaphthalen-7-one cas number83646-97-3 83646-86-0 (acetate)pubchem cid11776794chemspider9951477uniiq35f31b844comptox dashboard (epa)dtxsid10232491 chemical and physical dataformulac16h24o2molar mass248.366 g·mol−13d model (jsmol)interactive image smiles ccc1=c2ccc3(c(c2ccc1=o)ccc3o)c inchi inchi=1s/c16h24o2/c1-3-10-11-8-9-16(2)13(5-7-15(16)18)12(11)4-6-14(10)17/h12-13,15,18h,3-9h2,1-2h3/t12-,13+,15+,16+/m1/s1key:dotdlcmvuvgsdp-vrkrexbasa-n