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 N-cyclobutyl-2-methyl-N-(2,2,2-trifluoroethyl)pyrazolo[1,5-a]pyrimidine-3-sulfonamide into molecular formula.
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C13H15F3N4O2S
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