You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-hydroxy-4-methyl-N-[3-[(4-oxo-5,6,7,8-tetrahydro-1H-phthalazin-1-yl)methyl]phenyl]benzamide into its molecular formula.
user
C23H23N3O3
assistant