You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [4-(cyclopropylamino)-2-methyl-5,6,8,9-tetrahydropyrimido[4,5-d]azepin-7-yl]-(furan-2-yl)methanone into molecular formula.
user
C17H20N4O2
assistant