You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2,6-dimethylpyridin-3-yl)-[(2S)-2-methyl-4-[4-(trifluoromethyl)phenyl]sulfonylpiperazin-1-yl]methanone into molecular formula.
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C20H22F3N3O3S
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