Synonyms: 3'H-Cyclopropa[1,2]pregna-1,4,6-triene-3,20-dione,6-chloro-1b,2b-dihydro-17-hydroxy- (8CI);Pregna-4,6-diene-3,20-dione, 6-chloro-17-hydroxy-1a,2a-methylene- (7CI);1,2a-Methylene-6-chloro-6-17a-hydroxyprogesterone;6-Chloro-1,2a-methylene-4,6-pregnadien-17a-ol-3,20-dione;6-Chloro-17-hydroxy-1a,2a-methylenepregna-4,6-diene-3,20-dione;6-Chloro-6-dehydro-17a-hydroxy-1,2a-methyleneprogesterone;Cyproterone;SH 80881;SH 881;