You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[5-[[(5-methyl-4,5-dihydro-1H-imidazol-2-yl)amino]methyl]pyridin-2-yl]acetamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C12H17N5O
assistant