1,4-二氧六环

isopropyl 1,2-dihydro-3H-pyrrolo[1,2-a]pyrrole-1-carboxylate-7-carboxylic acid

dimethyl 1,2-dihydro-3H-pyrrolo[1,2-a]-pyrrole-1,7-dicarboxylate

methyl 1-(2-hydroxyethyl)-3-methoxycarbonylpyrrol-2-acetate

methyl N-(2-iodoethyl)-3-methoxycarbonyl-2-pyrroleacetate