You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-[1-(2-methoxyethyl)imidazol-2-yl]piperidin-1-yl]-(6-methylpyridin-2-yl)methanone is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H24N4O2
assistant