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 4-methyl-2-[[3-(2-methyl-3-oxo-1,4-benzoxazin-4-yl)propanoylamino]methyl]pentanoic acid is given. What is its corresponding molecular formula?
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C19H26N2O5
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