You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 2-naphthalen-2-yl-4-phenyl-6-[6-(9,9'-spirobi[fluorene]-4'-yl)naphthalen-2-yl]-1,3,5-triazine by IUPAC nomenclature, provide its molecular formula.
user
C54H33N3
assistant