You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-(4-tert-butylphenyl)-7-[9-(4-tert-butylphenyl)carbazol-3-yl]-9,9-dimethyl-N-phenylfluoren-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C53H50N2
assistant