You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
12-[4-(3,5-diisocyanophenyl)phenyl]-6-[3-(2-pyridin-3-yl-6-pyridin-4-ylpyridin-4-yl)phenyl]quinolino[6,5-f]quinoline is the IUPAC name of a molecule. Please give its molecular formula.
user
C51H29N7
assistant