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,4S)-4-ethyl-3,4-dihydroxypiperidin-1-yl]-[3-(3-hydroxy-3-methylbutyl)phenyl]methanone is given. What is its corresponding molecular formula?
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C19H29NO4
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