label: 6,(5)-methyl-4-oxo-9-phenylhydrazono-6,7,8,9-tetrahydro-4H-pyrido(1,2-a)pyrimidine-3-carboxylic acid
label_lc: 6,(5)-methyl-4-oxo-9-phenylhydrazono-6,7,8,9-tetrahydro-4h-pyrido(1,2-a)pyrimidine-3-carboxylic acid