Synonyms: Melengestro acetate;NSC 77897;delta(sup 6)-Dehydro-17-acetoxyprogesterone;17-Hydroxypregna-4,6-diene-3,20-dione acetate;17-Hydroxypregna-4,6-diene-3,20-dione acetate (ester);Pregna-4,6-diene-3,20-dione, 17-hydroxy-, acetate (ester);425-51-4;3,20-dioxopregna-4,6-dien-17-yl acetate;AC1L43PS;CHEBI:6723;MolPort-002-507-159;BB_NC-0635;NSC77897;NSC-77897;ZINC03881640;LS-118486;29522-EP2269989A1;29522-EP2272825A2;29522-EP2275420A1;29522-EP2280012A2;29522-EP2295055A2;29522-EP2295416A2;29522-EP2295426A1;29522-EP2295427A1;29522-EP2298748A2;29522-EP2298764A1;29522-EP2298765A1;29522-EP2298768A1;29522-EP2305642A2;29522-EP2311453A1;29522-EP2311825A1;29522-EP2311842A2;6-Methyl-17alpha-acetoxypregna-4,6-diene-3,20-dione;6-Methyl-delta(sup 6)-dehydro-17alpha-acetoxyprogesterone;6-Methyl-delta(sup 4,6)-pregnadien-17alpha-ol-3,20-dione acetate;[(8R,9S,10R,13S,14S,17R)-17-acetyl-10,13-dimethyl-3-oxo-2,8,9,11,12,14,15,16-octahydro-1H-cyclopenta[a]phenanthren-17-yl] acetate