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 1-(7-chloro-3,5-dihydro-2H-1,4-benzoxazepin-4-yl)-2-(3,4-dihydro-1H-isoquinolin-2-yl)propan-1-one is given. What is its corresponding molecular formula?
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C21H23ClN2O2
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