You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-dibenzofuran-1-yl-4-dibenzothiophen-2-yl-6-[8-[3-(9,9'-spirobi[fluorene]-2-yl)phenyl]dibenzofuran-1-yl]-1,3,5-triazine into its molecular formula.
user
C70H39N3O2S
assistant