1H-Pyrrole-3-carboxylic acid, 1-ethyl-4,5-dihydro-2-methyl-4-[(4-methylphenyl)methylene]-5-oxo-, methyl ester, (4Z)-;Methyl (4Z)-1-ethyl-2-methyl-4-(4-methylbenzylidene)-5-oxo-4,5-dihydro-1H-pyrrole-3-carboxylate
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