3,3-ethylenedioxy-5α-hydroxy-17α-acetoxy-11β-4-(N,,N-dimethylaminophenyl)-19-norpregna-9-en-20-one

乙酸酐

醋酸乌利司他中间体

Essigsaeure-trifluoressigsaeure-anhydrid

(5alpha,11beta)-11-[4-(二甲基氨基)苯基]-5,17-二羟基-19-去甲基雄甾-9-烯-3,20-二酮双(1,2-乙二醇)环缩醛