You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named methyl (4S)-6-amino-5-cyano-2-[(3-cyano-4,6-dimethylpyridin-2-yl)sulfanylmethyl]-4-(2-fluorophenyl)-4H-pyran-3-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C23H19FN4O3S
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