You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (2S)-3-methyl-2-[methyl-[2-[2-[2-[2-(methylamino)ethoxy]ethoxy]ethoxy]ethyl]amino]-N-(2-oxopropyl)butanamide is given. What is its corresponding molecular formula?
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C18H37N3O5
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