You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2E)-2-(7-cyano-3-oxo-1H-benzo[de]quinolin-2-ylidene)-3-oxo-1H-benzo[de]quinoline-7-carbonitrile The above is the IUPAC name of a molecule. Write its molecular formula.
user
C26H12N4O2
assistant