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-[2-(4-bromophenyl)-2-oxoethyl]sulfanyl-6-ethyl-3-methyl-2-sulfanylidene-[1,3]thiazolo[4,5-d]pyrimidin-7-one by IUPAC nomenclature, provide its molecular formula.
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C16H14BrN3O2S3
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