56643-56-2
diethyl 4-methylidene-5-oxooxolane-3,3-dicarboxylate
+
26862-71-5
ethyl 1,3-dihydropyrrolo[3,4-b]quinoline-2-carboxylate
→
26862-73-7
1,3a,4,4a,11,13a-hexahydro-3h,13h-furo[3',4':6,7]indolizino[1,2-b]quinoline-3,13-dione