2-Méthyl-3-(3-méthyl-1H-pyrazol-5-yl)pyrido[1,2-a]pyrimidin-4-one

The structure of the title compound, C13H12N4O, shows that the molecule adopts a flat conformation. There is an intermolecular hydrogen bond between the NH function of the pyrazole ring and the O atom of the pyridopyrimidinone group.