You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[(5-methylpyrazin-2-yl)methyl]-2-morpholin-4-yl-5-oxo-[1,3]benzothiazolo[3,2-a][1,8]naphthyridine-6-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C25H22N6O3S
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