You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[4-[9,9-dimethyl-7-(4-methyl-N-(4-methylphenyl)anilino)fluoren-2-yl]-2,5-dimethylphenyl]-9,9-dimethyl-N-(4-methylcyclohexa-1,5-dien-1-yl)-N-(4-methylphenyl)fluoren-2-amine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C66H62N2
assistant