You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 7-fluoro-2-methyl-3-[[1-(5-methylpyrazolo[1,5-a]pyrimidin-7-yl)piperidin-4-yl]methyl]quinazolin-4-one by IUPAC nomenclature, provide its molecular formula.
user
C22H23FN6O
assistant