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-[(4aS)-3-(2-phenylethyl)-1,2,4,4a,5,11a-hexahydropyrido[3,4-c][1,5]benzoxazepin-11-yl]propan-1-one is given. What is its corresponding molecular formula?
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C23H28N2O2
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