You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by 4,6-diphenyl-2-[11-(11-phenylbenzo[a]carbazol-8-yl)benzo[c]carbazol-7-yl]thieno[3,2-d]pyrimidine ?
user
C56H34N4S
assistant