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Under IUPAC nomenclature, a molecule named N-[5-[2-[4-(3,4-dimethoxyphenyl)-6-methylpyrimidin-5-yl]ethynyl]-2-methoxypyridin-3-yl]-2-fluoro-4-methylbenzenesulfonamide is given. What is its corresponding molecular formula?
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C28H25FN4O5S
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