(R)-4-[(1R,3aS,4S,5S,7aR)-4-Carboxymethyl-7a-methyl-5-((R)-1-methyl-2-oxo-cyclohex-3-enyl)-octahydro-inden-1-yl]-pentanoic acid methyl ester 以
环己烷 、
乙酸乙酯 为溶剂,
以55%的产率得到(R)-4-((1R,3aS,4R,7aR)-4-Carboxymethyl-7a-methyl-2,3,3a,4,7,7a-hexahydro-1H-inden-1-yl)-pentanoic acid methyl ester