You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[4-phenyl-6-(3-phenylphenyl)-1,3,5-triazin-2-yl]spiro[fluorene-9,9'-thioxanthene] 10',10'-dioxide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C46H29N3O2S
assistant