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1.Semisynthetic Preparation and Isolation of Dimeric Procyanidins B1-B8 from Roasted Hazelnut Skins (Corylus avellana L.) on a Large Scale Using Countercurrent Chromatography 2.Ethyl acetate-n-butanol gradient solvent system for high-speed countercurrent chromatography to screen bioactive substances in okra 3.Structure Elucidation of Procyanidin Oligomers by Low-Temperature 1H NMR Spectroscopy |
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