You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[6-[1,3-dioxo-2-(2-phenylphenyl)isoindol-4-yl]-9-phenylcarbazol-3-yl]-2-(2-phenylphenyl)isoindole-1,3-dione is the IUPAC name of a molecule. Please give its molecular formula.
user
C58H35N3O4
assistant