diethyl (1-methoxyethyl)phosphonate 、
17β-acetoxy-5,5-ethylenedioxy-3,4-dinor-2,5-secoandrostane-2-al 在
正丁基锂 、
二异丙胺 作用下,
生成 diethyl (3-hydroxy-4-((3S,3aS,5aS,6R,9aS,9bS)-3-hydroxy-3a,6-dimethyldodecahydrospiro[cyclopenta[a]naphthalene-7,2'-[1,3]dioxolan]-6-yl)-2-methoxybutan-2-yl)phosphonate