You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
14-[4-[2,2-bis(4-methoxyphenyl)ethenyl]phenyl]-14-azatetracyclo[13.4.0.02,7.08,13]nonadeca-1(19),2,4,6,8,10,12,15,17-nonaene The above is the IUPAC name of a molecule. Write its molecular formula.
user
C40H31NO2
assistant