You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[9,9-diphenyl-7-(3-phenylpyrrolo[2,3-c]carbazol-6-yl)fluoren-2-yl]-3-phenylpyrrolo[2,3-c]carbazole The above is the IUPAC name of a molecule. Write its molecular formula.
user
C65H42N4
assistant