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-[(4-bromo-1-methylpyrrol-2-yl)methyl]-3-ethyl-2-[2-(methanesulfonamido)ethyl]-1-methylguanidine into molecular formula.
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C13H24BrN5O2S
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