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 N-(3-phenylphenyl)-N-(4-spiro[fluorene-9,9'-xanthene]-4-ylphenyl)naphtho[1,2-b][1]benzofuran-8-amine .
user
C59H37NO2
assistant