You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(3-methoxyphenyl)-3-[1-[(3-methoxyphenyl)methyl]-4-oxo-3H-phthalazin-6-yl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H22N4O4
assistant