You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[2-amino-6-(furan-2-yl)pyrimidin-4-yl]-(4-pyridin-2-ylpiperazin-1-yl)methanone The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H18N6O2
assistant