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 (2R)-N-[(3S)-5-[[2-chloro-1-(2-isocyanophenyl)indol-3-yl]methyl]-4-oxo-2,3-dihydro-1,5-benzoxazepin-3-yl]-2-methylbutanamide is given. What is its corresponding molecular formula?
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C30H27ClN4O3
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