You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-[4-[2-(4-nitrophenyl)ethyl]piperazin-1-yl]-2-[4-(1,3-oxazol-2-yl)phenyl]ethanone into molecular formula.
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C23H24N4O4
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