You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[3-(7-isocyano-9,9-diphenylfluoren-4-yl)phenyl]-4,6-dinaphthalen-2-yl-1,3,5-triazine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C55H34N4
assistant