You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-di(carbazol-9-yl)-5-isocyano-3-[1,2,4,5,6,7,8,9,10-nonadeuterio-3-(trideuteriomethyl)-[1]benzofuro[2,3-a]carbazol-12-yl]-6-[1,2,4,5,6,7,8,9,10-nonadeuterio-3-(trideuteriomethyl)-[1]benzothiolo[2,3-a]carbazol-12-yl]benzonitrile is the IUPAC name of a molecule. Please give its molecular formula.
user
C70H40N6OS
assistant