1H-Pyrrole-3-carboxylic acid, 5-[(3-chlorophenyl)methylene]-4,5-dihydro-2-methyl-4-oxo-, methyl ester, (5E)-;Methyl (5E)-5-(3-chlorobenzylidene)-2-methyl-4-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate
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