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 1-[2-(5-bromo-2-fluorophenyl)ethyl]-3-ethyl-2-[(2-methyl-1,2,4-triazol-3-yl)methyl]guanidine into molecular formula.
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C15H20BrFN6
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