You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 5-[[1-carboxy-4-[2-[2-[2-[2-(ethylamino)ethylamino]-2-oxoethoxy]ethoxy]ethylamino]-4-oxobutyl]amino]-2,2,4-trimethyl-5-oxopentanoic acid by IUPAC nomenclature, provide its molecular formula.
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C23H42N4O9
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