Synonyms: 2a-acetyl-5b,11c-dimethyl-1,2,2a,4a,5,5a,5b,6,7,10,11,11a,11b,11c-tetradecahydronaphtho[2',1':4,5]indeno[7,1-bc]furan-8(3h)-one;18878-80-3;AC1L4VBK;AC1Q6P4Y;AR-1D7967;12alpha,17'-Epoxy-17alpha-methylprogesterone;12alpha,17'-Epoxy-17-methyl-4-pregnene-3,20-dione;2'H,5'H-Pregn-4-eno(12,13,17-bc)furan-3,20-dione, (2'beta)-