You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Translate the chemical IUPAC name 3-O-benzyl 1-O-[(1R)-1-ethoxyethyl] 2-(3-methylimidazol-3-ium-1-yl)propanedioate;bromide into its molecular formula.
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C18H23BrN2O5
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