(1S),3(R)-bis<(tert-butyldimethylsilyl)oxy>-20(S)-(hydroxymethyl)-9,10-secopregna-5(E),7(E),10(19)-triene

(6R)-SO2 adduct of 1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(S)-formyl-9,10-secopregna-5,7(E),10(19)-triene

(6S)-SO2 adduct of 1(S),3(R)-bis(tert-butyldimethylsilyloxy)-20(S)-formyl-9,10-secopregna-5,7(E),10(19)-triene

叔丁基二甲基氯硅烷

维他命D2二氧化硫加合物