You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
9-[4-[4-(2,6-diphenylpyridin-4-yl)phenyl]phenyl]-8,11,17-triazatetracyclo[8.7.0.02,7.011,16]heptadeca-1(10),2,4,6,8,12,14,16-octaene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C43H28N4
assistant