3,3-ethylenedioxy-19,19-difluoroandrost-5-en-17-one 、
甲氧基乙酸甲酯 生成 methyl (2Z)-2-[(8'S,9'S,10'S,13'S,14'S)-10'-(difluoromethyl)-13'-methylspiro[1,3-dioxolane-2,3'-2,4,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene]-17'-ylidene]-2-methoxyacetate