(2aR,3aS,3bS,3cS,5aS,6R,8aS,8bR)-6-acetyl-10-chloro-6-hydroxy-3b,5a-dimethyl-3,3a,3b,3c,4,5,5a,6,7,8,8a,8b-dodecahydrocyclopenta[a]cyclopropa[g]phenanthren-2(2aH)-one-D5; 6-Chloro-6-dehydro-17?-hydroxy-1,2?-methyleneprogesterone-D5; 6-Chloro-17-hydroxy-1?,2?-methylenepregna-4,6-diene-3,20-dione-D5; 1,2?-Methylene-6-chloro-6-17?-hydroxyprogesterone-D5; (1?,2?)-6-Chloro-1,2-dihydro-17-hydroxy-3'H-cyclopropa[1,2]pregna-1,4,6-triene-3,20-dione
