Synonyms: 4-(2,4-Dimethylphenyl)-1,4,5,6-tetrahydro-2-methyl-6-oxo-3-pyridinecarboxylic ac;4-(2,4-Dimethylphenyl)-1,4,5,6-tetrahydro-2-methyl-6-oxo-3-pyridinecarboxylic acid;4-(2,4-Dimethylphenyl)-2-methyl-6-oxo-1,4,5,6-tetrahydropyridine-3-carboxylic acid