You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-amino-4-[4-[(E)-4-[4-(2-amino-3-cyano-7,7-dimethyl-5-oxo-6,8-dihydro-4H-chromen-4-yl)phenoxy]but-2-enoxy]phenyl]-7,7-dimethyl-5-oxo-6,8-dihydro-4H-chromene-3-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C40H40N4O6
assistant