(8R,9S,10R,13S,14S)-10,13-dimethyl-1,2,7,8,9,10,11,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-17,2'-[1,3]dioxolan]-3-yl acetate,(8R,9S,10R,13S,14S)-10,13-dimethyl-1,2,7,8,9,10,11,12,13,14,15,16-dodecahydrospiro[cyclopenta[a]phenanthrene-17,2'-[1,3]dioxolan]-3-yl acetate,Abiraterone Acetate