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 5-(4-naphthalen-2-yl-[1]benzothiolo[2,3-d]pyrimidin-2-yl)-[1]benzothiolo[3,2-c]carbazole ?
user
C38H21N3S2
assistant