在
palladium on activated charcoal
氢气 、
sodium carbonate 作用下,
以
乙酸乙酯 为溶剂,
以51%的产率得到4-[[(3S,4aR,6aR,6bS,8aR,12aR,14aR,14bR)-8a-[5-[[(1S)-1-carboxy-2-phenylethyl]amino]-5-oxopentyl]-4,4,6a,6b,11,11,14b-heptamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl]oxymethyl]benzoic acid