You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(2,4-dimethoxyphenyl)-4-(1,3-dioxo-3a,4,7,7a-tetrahydroisoindol-2-yl)benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H22N2O5
assistant