Synonyms: Pregn-4-ene-3,20-dione,11b,17-dihydroxy- (8CI);Progesterone, 11b,17-dihydroxy-(6CI); 11b,17a-Dihydroxypregn-4-ene-3,20-dione; 11b,17a-Dihydroxyprogesterone; 21-Dehydrohydrocortisone;21-Deoxycortisol; 21-Deoxyhydrocortisone; 21-Desoxycortisol; Pregn-4-ene-11b,17a-diol-3,20-dione