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-bromo-4-methoxybenzene;2-[4-(6-chloro-2-formyl-1,3,4,9-tetrahydropyrido[3,4-b]indol-1-yl)phenoxy]acetonitrile by IUPAC nomenclature, provide its molecular formula.
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C27H23BrClN3O3
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