Synonyms: Pregn-4-ene-3,20-dione,17-hydroxy-6a-methyl-(7CI,8CI); Progesterone, 17-hydroxy-6a-methyl- (6CI); 17-Hydroxy-6a-methylpregn-4-ene-3,20-dione;17-Hydroxy-6a-methylprogesterone;17a-Hydroxy-6a-methylprogesterone; 6a-Methyl-17-hydroxyprogesterone; 6a-Methyl-17R-hydroxyprogesterone;6a-Methyl-17a-hydroxypregn-4-ene-3,20-dione; 6a-Methyl-17a-hydroxyprogesterone; 6a-Methyl-4-pregnen-17a-ol-3,20-dione;Medoxyprogesterone; Medroxyprogesteron; Medroxyprogesterone; NSC 27408; U 8840