1H-Pyrrole-3-carboxylic acid, 4,5-dihydro-2-methyl-5-[(4-nitrophenyl)methylene]-4-oxo-, ethyl ester, (5E)-;Ethyl (5E)-2-methyl-5-(4-nitrobenzylidene)-4-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate
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