You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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3-[4-chloro-5-[4-(1,3-thiazol-4-yl)phenyl]-3-(trifluoromethyl)pyrazol-1-yl]pyridine-2-sulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
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C18H11ClF3N5O2S2
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