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-(4-phenylphenyl)-N-(4-spiro[fluorene-9,11'-fluoreno[3,2-b][1]benzothiole]-12'-ylphenyl)dibenzothiophen-3-amine using the IUPAC nomenclature.
user
C61H37NS2
assistant