17a-Hydroxy-6-methyllutin acetate; Progesterone, 17-hydroxy-6-methyl-,acetate (6CI); SC 9686;Pregn-4-ene-3,20-dione,17-hydroxy-6-methyl-, acetate (7CI,8CI); 17-Acetoxy-6-methylprogesterone;Pregn-4-ene-3,20-dione,17-(acetyloxy)-6-methyl- (9CI); 

16a,17-Dihydroxyprogesteroneacetophenide; Progesterone, 16a,17-dihydroxy-, cyclic acetal with acetophenone (6CI);Pregn-4-ene-3,20-dione,16a,17-dihydroxy-, cyclic acetalwith acetophenone (7CI,8CI); NSC 68280; NSC 67831; 16a,17a-Dihydroxyprogesteroneacetophenide;Pregn-4-ene-3,20-dione,16,17-[(1-phenylethylidene)bis(oxy)]-, (16a)- (9CI);2H-Naphth[1',2':6,7]indeno[1,2-d][1,3]dioxole, pregn-4-ene-3,20-dione deriv.; 

D5-Progesterone;NSC 12875;Pregn-5-ene-3,20-dione(6CI,7CI,8CI,9CI); 

NSC 45416; 12a-Bromo-11b-hydroxypregn-4-ene-3,20-dione;Pregn-4-ene-3,20-dione,12-bromo-11-hydroxy-, (11b,12a)- (9CI);Pregn-4-ene-3,20-dione,12a-bromo-11b-hydroxy- (7CI,8CI); 11b-Hydroxy-12a-bromoprogesterone;Progesterone, 12a-bromo-11b-hydroxy- (6CI); 

2-Hydroxymethyleneprogesterone;Progesterone,2-(hydroxymethylene)- (6CI);Pregn-4-ene-3,20-dione,2-(hydroxymethylene)- (7CI,8CI,9CI); 

6a-Fluoro-11a-hydroxyprogesterone;Progesterone,6a-fluoro-11a-hydroxy- (6CI);Pregn-4-ene-3,20-dione,6a-fluoro-11a-hydroxy- (7CI,8CI); NSC 77899;U 17500; 

Pregn-4-ene-3,20-dione,6b-hydroxy-, acetate (7CI,8CI); 6b-Acetoxyprogesterone;Pregn-4-ene-3,20-dione,6-(acetyloxy)-, (6b)- (9CI);Progesterone, 6b-hydroxy-,acetate (6CI); 

RU 27112; 6a,16a-Dimethylpregn-4-ene-3,20-dione; RR 27112; Progesterone, 6a,16a-dimethyl- (6CI);Pregn-4-ene-3,20-dione,6,16-dimethyl-, (6a,16a)- (9CI);Pregn-4-ene-3,20-dione,6a,16a-dimethyl- (7CI,8CI); NSC 80618; 6a,16a-Dimethylprogesterone; 

NSC 525520;Progesterone,bis[(2,4-dinitrophenyl)hydrazone] (7CI,8CI);Pregn-4-ene-3,20-dione,bis[(2,4-dinitrophenyl)hydrazone] (9CI); 

Pregn-4-ene-3,20-dione,17-hydroxy-6b-methyl-, acetate(7CI,8CI); Progesterone, 17-hydroxy-6b-methyl-, acetate (6CI); 6b-Methyl-17a-hydroxyprogesteroneacetate; NSC 119085;Pregn-4-ene-3,20-dione,17-(acetyloxy)-6-methyl-, (6b)- (9CI); 

Progesterone, 11b,18-epoxy-21-hydroxy-(6CI);Pregn-4-ene-3,20-dione,11,18-epoxy-21-hydroxy-, (11b)- (9CI); 18-Deoxyaldosterone;Pregn-4-ene-3,20-dione,11b,18-epoxy-21-hydroxy- (7CI,8CI); 11,13-(Epoxymethano)-13H-cyclopenta[a]phenanthrene,pregn-4-ene-3,20-dione deriv.; 

Progesterone,2a-methyl- (6CI);Pregn-4-ene-3,20-dione,2-methyl-, (2a)-(9CI);Pregn-4-ene-3,20-dione,2a-methyl- (7CI,8CI); 2a-Methyl-4-pregnene-3,20-dione; 2a-Methylprogesterone; NSC 19606; 

NSC 44448; 7a-Methyl-4-pregnene-3,20-dione;Pregn-4-ene-3,20-dione,7a-methyl- (7CI,8CI);Pregn-4-ene-3,20-dione,7-methyl-, (7a)-(9CI); Progesterone,7a-methyl- (6CI); 

Pregn-4-ene-3,20-dione,11b-hydroxy-6a,11-dimethyl- (7CI,8CI); NSC 51176;Progesterone,11b-hydroxy-6a,11-dimethyl- (6CI); 

Progesterone, 17-hydroxy-, propionate (6CI);Pregn-4-ene-3,20-dione,17-(1-oxopropoxy)- (9CI);NSC 63559;Pregn-4-ene-3,20-dione,17-hydroxy-, propionate (7CI,8CI); 

Lumiprogesterone; Retroprogesterone; 9b,10a-Progesterone;Pregn-4-ene-3,20-dione,(9b,10a)-;9b,10a-Pregn-4-ene-3,20-dione (6CI,7CI,8CI); 

NSC66588;Pregn-4-ene-3,20-dione,16a-(methylthio)- (7CI,8CI);16a-(Methylthio)progesterone; 

Pregn-4-ene-3,20-dione,17-(acetyloxy)-21-fluoro-6-methyl-, (6a)- (9CI); Progesterone, 21-fluoro-17-hydroxy-6a-methyl-, acetate (6CI);Pregn-4-ene-3,20-dione,21-fluoro-17-hydroxy-6a-methyl-, acetate (7CI,8CI); 

NSC 90613;Pregn-4-ene-3,20-dione,9-fluoro-11b,17-dihydroxy-2a-methyl-, 17-acetate (7CI,8CI);Pregn-4-ene-3,20-dione,17-(acetyloxy)-9-fluoro-11-hydroxy-2-methyl-, (2a,11b)- (9CI);Progesterone, 9-fluoro-11b,17-dihydroxy-2a-methyl-, 17-acetate (6CI); 

Pregn-4-ene-3,20-dione,21-fluoro-17-hydroxy- (7CI,8CI); NSC 15427;Progesterone,21-fluoro-17-hydroxy- (6CI);