nordinone nordinone nordinone (inn), also known as 11α-hydroxy-17,17-dimethyl-18-norandrosta-4,13-dien-3-one, is a naturally occurring steroid with antiandrogen properties isolated as a metabolite from the fungus monocillium nordinii. nordinone names iupac name 11α-hydroxy-10,17,17-trimethylgonane-4,13-dien-3-one systematic iupac name (3br,9ar,9bs,10r)-10-hydroxy-1,1,9a-trimethyl-1,2,3,3b,4,5,8,9,9a,9b,10,11-dodecahydro-7h-cyclopentaphenanthren-7-one identifiers cas number 33122-60-0 y 3d model (jsmol) interactive image chemspider 2298522 pubchem cid 3033958 unii 76fq40x1xh y comptox dashboard (epa) dtxsid70186784 inchi inchi=1s/c20h28o2/c1-19(2)8-7-14-15-5-4-12-10-13(21)6-9-20(12,3)18(15)17(22)11-16(14)19/h10,15,17-18,22h,4-9,11h2,1-3h3/t15-,17+,18+,20-/m0/s1key: alfaujvlirdqgd-mmtroxrisa-n smiles c12ccc(=o)c=c1cc32(cc4=c3ccc4(c)c)o properties chemical formula c20h28o2 molar mass 300.442 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references