You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
8,8-dimethyl-3-(4-piperidin-1-ylpiperidine-1-carbonyl)-7,9-dihydropyrazolo[1,5-a]quinazolin-6-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H31N5O2
assistant