Synonyms: | Pregn-4-ene-3,11-dione,17,20b,21-trihydroxy- (6CI,8CI); 17,20b,21-Trihydroxypregn-4-ene-3,11-dione;17a,20b,21-Trihydroxy-4-pregnene-3,11-dione; 20b-Dihydrocortisone; 20b-Hydroxycortisone; Pregn-4-en-17a,20b,21-triol-3,11-dione; Pregn-4-ene-17a,20b,21-triol-3,11-dione; Reichstein's substance U |