You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
5-benzo[c]carbazol-7-yl-2-[7,7-dimethyl-2-(N-phenylanilino)indeno[2,1-b]carbazol-5-yl]-4-isocyanobenzonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C57H37N5
assistant