You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[4-([1]benzofuro[2,3-g]quinolin-9-yl)phenyl]-9,9-diphenyl-N-(4-phenylphenyl)fluoren-2-amine is the IUPAC name of a molecule. Please give its molecular formula.
user
C58H38N2O
assistant