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 ethyl 2-bromo-2-(6-fluoro-8-methyl-1-propyl-4,9-dihydro-3H-pyrano[3,4-b]indol-1-yl)acetate into its molecular formula.
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C19H23BrFNO3
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