You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[8-(3-cyanophenyl)-9-[1,3-dioxo-2-(2,4,6-trimethylphenyl)isoindol-4-yl]carbazol-1-yl]benzonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C43H28N4O2
assistant