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system
Translate the chemical IUPAC name ethyl (E,4S)-2,5-dimethyl-4-[methyl-[3-methyl-2-[[(2R,5R)-5-methyl-1-propan-2-ylpiperidine-2-carbonyl]amino]butanoyl]amino]hex-2-enoate into its molecular formula.
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C26H47N3O4
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