“…17 ex-Ethynylsteroids 'can easily be separated from the saturated analogues on silver nitrate-silica gel layers [50]; differentiation of 19-norsteroids [64] and testing their stability [61], separation and purity control of synthetic corticosteroids [37a, 71a]. Distinction of syn-and antioximes [66]; reactions of LJ5,3,Bhydroxysteroids [63], identification in preparations of sesame oil [101], quantitative analysis of pharmacological active pregnene derivatives [21]. See MATTHEWS et al [122] concerning the quantitative analysis of steroids by means of TLC.…”