You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 3-[[3-phenyl-2-[[3-[(2,9,9-triphenylfluoren-3-yl)amino]phenyl]methyl]diaziridin-1-yl]methyl]benzonitrile .
user
C53H40N4
assistant