You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-acetylpiperazin-1-yl)-4-methyl-N-[(4-methylphenyl)methyl]phthalazine-6-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H27N5O2
assistant