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 12-propan-2-yl-2-(12-propan-2-yl-[1]benzothiolo[2,3-a]carbazol-3-yl)-[1]benzothiolo[3,2-a]carbazole .
user
C42H32N2S2
assistant