You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[4-(4,9-dinaphthalen-2-yl-3-phenylbenzo[f]benzimidazol-2-yl)phenyl]-bis(2,4,6-trimethylphenyl)borane The above is the IUPAC name of a molecule. Write its molecular formula.
user
C61H49BN2
assistant