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-[4'-(4-cyanophenyl)-5-(4,6-diphenyl-1,3,5-triazin-2-yl)spiro[benzo[c]fluorene-7,9'-fluorene]-2'-yl]benzonitrile ?
user
C58H33N5
assistant