You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-[(1R,2R,6S,7S,9R)-9-bromo-5-phenyl-3-oxa-4,8-diazatricyclo[5.2.1.02,6]dec-4-en-8-yl]ethanone .
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C15H15BrN2O2
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