You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl 7-methyl-4-oxo-3-phenylmethoxypyrido[1,2-a]pyrimidine-2-carboxylate;7-methyl-4-oxo-3-phenylmethoxypyrido[1,2-a]pyrimidine-2-carbohydrazide is the IUPAC name of a molecule. Please give its molecular formula.
user
C35H32N6O7
assistant