You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[1-[6-[4-(4-cyanophenyl)isoquinolin-1-yl]-1,5-naphthyridin-2-yl]isoquinolin-4-yl]benzonitrile into molecular formula.
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C40H22N6
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