You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-[6-methoxy-5-(1H-pyrazol-4-yl)pyridin-2-yl]-3-(pyridin-3-ylmethyl)imidazolidin-2-one .
user
C18H18N6O2
assistant