(+/-)-7-methoxy-1c-methyl-(10ar)-1,2,3,9,10,10a-hexahydro-phenanthrene-1t,2t-dicarboxylic acid-anhydride 在
palladium on activated charcoal 、
乙酸酐 、
溶剂黄146 作用下,
生成 (+/-)-7-methoxy-1
c-methyl-(4a
c,10a
r)-1,2,3,4,4a,9,10,10a-octahydro-phenanthrene-1
t,2
t-dicarboxylic acid-anhydride