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 3-phenyl-2-[3,6,8-tris(3-phenylimidazo[4,5-b]pyridin-2-yl)pyren-1-yl]imidazo[4,5-b]pyridine ?
user
C64H38N12
assistant