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 2'-[3-[4-phenyl-6-[3-(4-phenylphenyl)phenyl]-1,3,5-triazin-2-yl]phenyl]spiro[1-azapentacyclo[10.7.1.02,7.08,20.014,19]icosa-2,4,6,8(20),9,11,14,16,18-nonaene-13,9'-fluorene] ?
user
C64H40N4
assistant