You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[2-[4-[2-[10-[2-[2,5-bis(3,7-dimethyloctoxy)-4-[2-[4-(N-phenylanilino)phenyl]ethynyl]phenyl]ethynyl]anthracen-9-yl]ethynyl]-3-cyanophenyl]ethynyl]benzoic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C80H74N2O4
assistant