You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-(9-naphthalen-1-ylcarbazol-3-yl)-7-phenyl-5-(3-phenylphenyl)indolo[2,3-b]carbazole;2-(9-naphthalen-1-ylcarbazol-3-yl)-11-phenyl-5-(3-phenylphenyl)indolo[3,2-b]carbazole is the IUPAC name of a molecule. Please give its molecular formula.
user
C116H74N6
assistant