You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule 6-hydroxy-1-(2-methylpropyl)-4-[5-[(4-methylpyrazol-1-yl)methyl]-1,2-oxazole-3-carbonyl]-1,4-diazepan-2-one into molecular formula.
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C18H25N5O4
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