142458-15-9 3-Cyclohexene-1-carboxylic acid, 4-((4-ethylphenyl)amino)-6-methyl-2-oxo-, methyl ester BRN 5441426 Methyl 4-((4-ethylphenyl)amino)-6-methyl-2-oxo-3-cyclohexene-1-carboxylate