You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1-acetyl-3-[2-(3-acetyl-4,5-dimethyl-2-oxoimidazol-1-yl)ethyl]-4,5-dimethylimidazol-2-one into its molecular formula.
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C16H22N4O4
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