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-(difluoromethylsulfanyl)pyridin-3-yl]-[4-[4-(trifluoromethyl)phenyl]sulfonylpiperazin-1-yl]methanone into molecular formula.
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C18H16F5N3O3S2
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