methyl 5-phenyl-3,4-dihydro-2H-pyrrole-4-carboxylate

2-phenyl-4-carbomethoxy-Δ1-pyrroline

2,5-diphenyl-4,5-dihydro-1,3-oxazole

dimethyl 2-phenyl-1H-pyrrole-3,4-dicarboxylate

methyl 4,5-diphenyl-3,4-dihydro-2H-pyrrole-3-carboxylate