rac-16-acetoxy-3,3-ethanediyldioxy-11β,18a-epoxy-18a-methyl-18-homo-androsta-5,16,18-triene-17-carboxylic acid ethyl ester 在
palladium on activated charcoal 、
乙酸乙酯 、
barium carbonate 作用下,
生成
rac-3,3-ethanediyldioxy-11β,18a-epoxy-18a-methyl-18-homo-5ξ-androst-18-ene-17β-carboxylic acid methyl ester