21-acyloxy-16-methyl-17-hydroxy-9(11)-pregnenes
21-acyloxy-17.alpha.-hydroxypregnane-3,11,20-trione and...
21-acyloxy-4-pregnene-3,6,20-triones
21-acyloxy-pregn-9(11)-en-20-one compounds
21-acyloxylation of 20-keto steroids
21-aldehydes of the pregnane series and derivatives thereof...
21-aldehydes of the pregnane series and derivatives thereof...
21-alkanesulfonyloxy steroids
21-amino derivatives of corticosteroids
21-azido-3,20-diketo-11-oxygenated steroids
21-bis-steroid-esters of dicarboxylic acids of the pregnane...
21-bromo-16-methylpregnane-17.alpha.-ol-20-ones and process
21-butylacetate esters of 9.alpha.-fluoro-4-pregnenes
21-carboxylic acid esters of pregnane compounds
21-chloro-pregnane derivative
21-corticoid carbonates
21-dicarboxylic acid esters of 16.alpha.,17.alpha.-acetal...
21-esters de la triamcinolone et leur procede de preparation
21-esters of 14-hydroxy-11-desoxycorticosterone
21-esters of pregnenes of tertiary acids