You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 7-tert-butyl-3-[4-[4-[4-(9,9-dimethylfluoren-2-yl)phenyl]phenyl]phenyl]-4,10c-dihydropyrene .
user
C53H44
assistant