丁二酸 、
5'-(4-methylphenyl)-3'-[2-(methylthio)ethyl]-3a',6a'-dihydro-2'H-spiro[indole-3,1'-pyrrolo[3,4-c]pyrrol]-2,4',6'(1H,3'H,5'H)-trione 以
乙醇 为溶剂,
以100%的产率得到5′-(4-methylphenyl)-3′-[2-(methylthio)ethyl]-3a′,6a′-dihydro-2′H-spiro[indole-3,1′-pyrrolo[3,4-c]pyrrol]-2,4′,6′(1H,3′H,5′H)-trione succinic acid