You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name N-butyl-2-[4-(4-chloro-3-methoxyphenyl)-5-pyridin-4-yl-1H-imidazol-2-yl]-2-methylpropanamide into its molecular formula.
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C23H27ClN4O2
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