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-[2-oxo-2-[4-[(2S)-oxolane-2-carbonyl]piperazin-1-yl]ethyl]-3-phenylimidazolidin-2-one into molecular formula.
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C20H26N4O4
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