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 N-[(4-bromophenyl)methyl]-2-[(1R,2S,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]acetamide is given. What is its corresponding molecular formula?
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C18H17BrN2O3
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