You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 1,3-di(dibenzothiophen-2-yl)-9-[3-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]carbazole .
user
C57H34N4S2
assistant