Synonyms: Megace ES;Pregna-4,6-diene-3,20-dione, 17-(acetyloxy)-6-methyl-;Ovarid;Megace;Ovaban (Veterinary);Megeron;6-Methyl-delta4,6-pregnadien-17alpha-ol-3,20-dione acetate;6-Methyl-6-dehydro-17.alpha.-acetoxyprogesterone;Megace (TN);SC 10363;Megestryl acetate;Pregna-4,6-diene-3, 20-dione, 17-hydroxy-6-methyl-, acetate;Pallace;Ovaban;S4;6-Methyl-17-alpha-hydroxy-delta(sup 6)-progesterone acetate;SC-10363;SC10363;Niagestin;Progesterone, 6-dehydro-17-hydroxy-6-methyl-, acetate;6-Methyl-delta(sup 4,6)-pregnadien-17-alpha-ol-3,20-dione acetate;Megestrol acetate [USAN];17alpha-Acetoxy-6-dehydro-6-methylprogesterone;Megestrol acetate (USAN);Megestat;6-Dehydro-6-methyl-17.alpha.-acetoxyprogesterone;17-Hydroxy-6-methylpregna-4,6-diene-3,20-dione acetate;Megestrol acetole [Progestins];6-MethleneProgesterone Acetate;Pregna-4,6-diene-3, 20-dione, 17- (acetyloxy)-6-methyl-;BDH 1298;