(1R,3S,4aS,10aR)-7-((S)-2-Benzoyloxy-1-methyl-ethyl)-3-methanesulfonyloxy-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydro-phenanthrene-1-carboxylic acid methyl ester 在
palladium on activated charcoal
2,4-二甲基吡啶 、
氢气 作用下,
生成
methyl (15S)-16-benzoyloxy-8,11,13-abietatrien-18-oate