You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl 1-[N'-methyl-N-[(2-methylpyrimidin-4-yl)methyl]carbamimidoyl]piperidine-4-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H25N5O2
assistant