You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2,3,4,4a,5,6,7,7a-octahydrocyclopenta[b]pyridin-1-yl-(3-amino-5-bromo-2-methylphenyl)methanone is given. What is its corresponding molecular formula?
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C16H21BrN2O
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