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 (1S,3R)-1-(6-bromo-2-methylimidazo[1,2-a]pyridin-3-yl)-3-methyl-1,3-dihydroisoindole-2-carboxylic acid into its molecular formula.
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C18H16BrN3O2
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