You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-bromo-N-[4-(6-pyrazol-1-ylpyridazin-3-yl)oxyphenyl]thiophene-2-sulfonamide by IUPAC nomenclature, provide its molecular formula.
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C17H12BrN5O3S2
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