You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-(3,5-diphenylphenyl)-4-[4-(5-isocyano-9,9'-spirobi[fluorene]-3-yl)phenyl]-6-phenyl-1,3,5-triazine into its molecular formula.
user
C59H36N4
assistant