You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[4-[[2-(2-hydroxyethylamino)-2-oxo-1-(3-pyridin-3-ylpropanoylamino)ethyl]amino]phenoxy]butanoic acid into molecular formula.
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C22H28N4O6
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