You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 3-[4-[4-(9,9-dimethylfluoren-2-yl)naphthalen-1-yl]phenyl]-3a,6b,10a,10c-tetrahydrofluoranthene by IUPAC nomenclature, provide its molecular formula.
user
C47H36
assistant