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 (3S)-4-[2-[2-[2-[2-[2-[2-[2-[2-[2-[(3R,5S)-2-(hydroxymethyl)-4,5-dimethoxyoxan-3-yl]oxyethoxy]ethoxy]ethoxy]ethylamino]-2-oxoethoxy]ethoxy]ethoxy]ethoxy]ethylamino]-4-oxo-3-[[1-(1-oxo-4-piperidin-4-ylbutan-2-yl)piperidine-3-carbonyl]amino]butanoic acid is given. What is its corresponding molecular formula?
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C45H81N5O18
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