You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-cyclohexylphenyl)-N-[4-[3-(3,5-ditert-butylphenyl)phenyl]phenyl]-9,9-dimethylfluoren-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C53H57N
assistant