重氮甲烷 、
<6aR-(6aα,7β,10aβ)>-1-hydroxy-12-methoxy-7-methoxymethyl-7,10a-dimethyl-5,6,6a,7,8,9,10,10a-octahydrochrysene-3-carboxylic acid 以
乙醚 为溶剂,
反应 0.25h,
以100%的产率得到methyl <6aR-(6aα,7β,10aβ)>-1-hydroxy-12-methoxy-7-methoxymethyl-7,10a-dimethyl-5,6,6a,7,8,9,10,10a-octahydrochrysene-3-carboxylate