N'-(5,5-dimethyl-3-oxocyclohex-1-en-1-yl)-4-nitrobenzohydrazide 、
4-benzoyl-5-methoxycarbonyl-1-p-tolyl-2,3-dihydro-2,3-pyrroledione 以
1,2-二氯乙烷 为溶剂,
以85%的产率得到N-[3′-benzoyl-4′-hydroxy-6,6-dimethyl-1′-(4-methylphenyl)-2,4,5′-trioxo-1′,4,5,5′,6,7-hexahydrospiro[indole-3,2′-pyrrol]-1(2H)-yl]-4-nitrobenzamide