You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[(2S)-2-(5,6-dimethyl-7-oxo-1H-pyrazolo[1,5-a]pyrimidin-2-yl)piperidine-1-carbonyl]-3-methylphenyl]methanesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C22H27N5O4S
assistant