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