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 9-[5-[3-(4,4a-dihydrodibenzothiophen-2-yl)carbazol-9-yl]pyridin-2-yl]-3,6-di(dibenzothiophen-2-yl)carbazole .
user
C65H39N3S3
assistant