You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (8-methoxy-3,4-dihydro-2H-quinolin-1-yl)-(6-pyridin-4-ylpyridin-3-yl)methanone is given. What is its corresponding molecular formula?
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C21H19N3O2
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