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 4-(ethylamino)-N-(2-fluoro-3-hydroxy-3-methylbutyl)-6-[(7-fluoro-1,5-naphthyridin-2-yl)amino]pyridine-3-carboxamide is given. What is its corresponding molecular formula?
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C21H24F2N6O2
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