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-(3-bromothiophen-2-yl)-2-[2-(2-methylpropyl)-1,2,4-triazol-3-yl]ethyl]hydrazine by IUPAC nomenclature, provide its molecular formula.
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C12H18BrN5S
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