You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (2R)-3-methyl-2-[(2-oxo-1,3,4,5-tetrahydro-1-benzazepin-7-yl)sulfonylamino]butanoic acid into molecular formula.
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C15H20N2O5S
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