33484-41-2 4H-Pyrido(1,2-a)pyrimidine-3-carboxylic acid, 6,7,8,9-tetrahydro-6-methyl-4-oxo-, butyl ester 6,7,8,9-Tetrahydro-6-methyl-4-oxo-4H-pyrido(1,2-a)pyrimidine-3-carboxylic acid butyl ester BRN 0679975 MZ-206