You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-[4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl]-[1]benzofuro[2,3-i]phenanthridine is the IUPAC name of a molecule. Please give its molecular formula.
user
C40H24N4O
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