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 2,2-dimethyl-1-(4-methyl-3-prop-1-en-2-yl-3,5a-dihydro-2-benzazepin-2-yl)propan-1-one is given. What is its corresponding molecular formula?
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C19H25NO
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