You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[4-[(2-methylphenyl)methyl]-1,4-diazepan-1-yl]-N-(3-propan-2-yl-1,2-oxazol-5-yl)acetamide into its molecular formula.
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C21H30N4O2
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