You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule N-[4-[2-(3-methylanilino)-2-oxoethyl]-1,3-thiazol-2-yl]-6-oxo-3H-pyridine-3-carboxamide into molecular formula.
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C18H16N4O3S
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