You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 11-[4,6-bis(4-phenylphenyl)-1,3,5-triazin-2-yl]-5-(3-phenylphenyl)-7a,12a-dihydro-[1]benzofuro[3,2-c]carbazole using the IUPAC nomenclature.
user
C57H38N4O
assistant