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 6-N,11-N-bis(6-methyldibenzofuran-4-yl)-6-N,11-N-bis(4-methylphenyl)naphtho[3,2-b][1]benzofuran-6,11-diamine .
user
C56H40N2O3
assistant