1,1'-(3,5,3',5'-tetramethyl-4,4'-methanediyl-di-pyrrol-2-yl)-bis-ethanone

1,1-bis-(4-acetyl-3,5-dimethyl-pyrrol-2-yl)-ethane

ethyl 5-[1-(4-ethoxycarbonyl-3,5-dimethyl-1H-pyrrol-2-yl)ethyl]-2,4-dimethyl-1H-pyrrole-3-carboxylate