125055-54-1 4H-Pyrido(1,2-a)pyrimidine-3-carboxamide, N-(1,1-dimethylethyl)-6-methyl-4-oxo- N-(1,1-Dimethylethyl)-6-methyl-4-oxo-4H-pyrido(1,2-a)pyrimidine-3-carboxamide N-tert-Butyl-6-methyl-4-oxo-4H-pyrido(1,2-a)pyrimidine-3-carboxamide