重氮甲烷 、
[(1R,2S,5R)-2-[(3aS,5S,7aS)-5-Acetoxy-4,4,7a-trimethyl-1-oxo-octahydro-inden-(2Z)-ylidenemethyl]-5-((R)-1,5-dimethyl-hexyl)-1,2-dimethyl-cyclopentyl]-acetic acid 生成 [(1R,2S,5R)-2-[(3aS,5S,7aS)-5-Acetoxy-4,4,7a-trimethyl-1-oxo-octahydro-inden-(2Z)-ylidenemethyl]-5-((R)-1,5-dimethyl-hexyl)-1,2-dimethyl-cyclopentyl]-acetic acid methyl ester