You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-(2-bromoethyl)-3-(4-chloro-2-fluorophenyl)-2lambda6,1,3-benzothiadiazole 2,2-dioxide by IUPAC nomenclature, provide its molecular formula.
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C14H11BrClFN2O2S
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