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 5-[[2,5-difluoro-4-[[(2S,4S)-4-fluoro-2-phenylpiperidin-1-yl]methyl]phenyl]sulfonylmethyl]-1,2,4-thiadiazole into molecular formula.
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C21H20F3N3O2S2
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