You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-dibenzothiophen-1-yl-4-(3-phenylphenyl)-6-[8-[4-(9,9'-spirobi[fluorene]-3-yl)phenyl]dibenzofuran-1-yl]-1,3,5-triazine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C70H41N3OS
assistant