You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as N-naphthalen-2-yl-N-spiro[fluorene-9,9'-thioxanthene]-3-ylspiro[fluorene-9,9'-thioxanthene]-2-amine using the IUPAC nomenclature.
user
C60H37NS2
assistant