list of steroidal antiandrogens list of steroidal antiandrogens this is a list of steroidal antiandrogens. cyproterone acetate, the most well-known and widely used steroidal antiandrogen. steroid ring system. progesterone derivatives 11α-hydroxyprogesterone = 11α-hydroxyprogesterone chlormadinone acetate = 17α-acetoxy-6-chloro-δ6-progesterone clometerone (l-38000) = 6α-chloro-16α-methylprogesterone cyproterone (sh-80881) = 1,2α-methylene-6-chloro-δ6-17α-hydroxyprogesterone cyproterone acetate = 1,2α-methylene-6-chloro-δ6-17α-acetoxyprogesterone edogestrone (ph-218) = 17α-acetoxy-3,3-ethylenedioxy-6-methylpregn-5-en-20-one medrogestone = 6,17α-dimethyl-δ6-progesterone megestrol acetate = 17α-acetoxy-δ6-6-methylprogesterone nomegestrol acetate = 17α-acetoxy-δ6-6-methyl-19-norprogesterone osaterone acetate (tzp-4238) = 17α-acetoxy-6-chloro-2-oxa-δ6-progesterone testosterone derivatives abiraterone (cb-7598) = 17-(3-pyridinyl)androsta-5,16-dien-3β-ol abiraterone acetate = 17-(3-pyridinyl)androsta-5,16-dien-3β-ol acetate benorterone (skf-7690, fc-612) = 17α-methyl-b-nortestosterone bomt (ro 7-2340) = 6α-bromo-4-oxa-17α-methyl-4,5α-dihydrotestosterone delanterone (gbr-21162) = 17β-dehydroxy-1α-methyl-δ16-testosterone dienogest = 17α-cyanomethyl-19-nor-δ9(10)-testosterone epitestosterone = 17α-epitestosterone galeterone (tok-001, vn/124-1) = 17-(1h-benzimidazol-1-yl)androsta-5,16-dien-3β-ol metogest (sc-14207) = 16,16-dimethyl-19-nortestosterone mifepristone = 11β--17-(1-propynyl)-δ9-19-nortestosterone oxendolone (tsaa-291) = 16β-ethyl-19-nortestosterone rosterolone (sh-434, 17α-propylmesterolone) = 1α-methyl-17α-propyl-4,5α-dihydrotestosterone topterone (win-17665) = 17α-propyltestosterone trimethyltrienolone (r-2956, ru-2956) = 2α,2β,17α-trimethyl-19-nor-δ9,11-testosterone zanoterone (win-49596) = (5α,17α)-1'-(methylsulfonyl)-1'-h-pregn-20-ynopyrazol-17-ol spirolactone derivatives main article: spirolactone sc-5233 (spirolactone) = 17α-(2-carboxyethyl)testosterone γ-lactone sc-8109 = 19-norspirolactone canrenone (aldadiene) = δ6-spirolactone dicirenone (sc-26304) = 7α-carboxyisopropylspirolactone drospirenone = 6β,7β:15β,16β-dimethylenespirolactone mespirenone (zk-94679) = δ1-7α-acetylthio-15β,16β-methylenespirolactone mexrenone (zk-32055, sc-25152) = 7α-(methoxycarbonyl)spirolactone prorenone (sc-23133) = 6α,7α-methylenespirolactone spironolactone = 7α-acetylthiospirolactone spirorenone (zk-35973) = δ1-6β,7β:15β,16β-dimethylenespirolactone spiroxasone = 7α-acetylthiospirolactone with the ketone group removed from the c17α spirolactone ring cortisol derivatives 9,11-dehydrocortexolone 17α-butyrate (cb-03-04) = 17α-(butyryloxy)-9,11-didehydrodeoxycorticosterone clascoterone (cb-03-01; cortexolone 17α-propionate, 11-deoxycortisol 17α-propionate) = 17α-(propionyloxy)deoxycorticosterone others guggulsterone = pregna-4,17-diene-3,16-dione nordinone = 11α-hydroxy-17,17-dimethyl-18-norandrosta-4,13-dien-3-one