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 N,N,2,9-tetraphenyltetracyclo[8.6.0.03,8.011,16]hexadeca-1,3(8),4,6,9,11,13,15-octaen-4-amine ?
user
C40H27N
assistant