rac11β,18a
c-epoxy-18a
t-methyl-3-oxo-18-homo-14β-androsta-4,18-diene-17α-carboxylic acid methyl ester 在
chromium(VI) oxide 、
二氯甲烷 、
溶剂黄146 作用下,
生成
rac-18-acetyl-3,11-dioxo-14β-androst-4-ene-17α-carboxylic acid methyl ester 、
rac-11β-hydroxy-3-oxo-18-nor-14β-androst-4-ene-13,17α-dicarboxylic acid-13-lactone-17-methyl ester