期刊
PHYTOCHEMISTRY
卷 83, 期 -, 页码 144-152出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.phytochem.2012.07.011
关键词
Apple; Malus pumila cv. Fuji; Rosaceae; Proanthocyanidin; Procyanidin tetramer; NMR; Phloroglucinol degradation
Procyanidins are plant secondary metabolites widely consumed and known to have various physiological functions, but their bioavailability and mechanism of action are still unclear especially for larger oligomers. One of the reasons is scarce information about the detailed structure of oligomeric procyanidins. As for apple, structures of procyanidin components larger than trimers are scarcely known. In this study, 11 tetrameric procyanidins including two known compounds were isolated from unripe apples (Malus pumila cv. Fuji) and identified by NMR spectroscopic analysis and phloroglucinol degradation. As a result, the detailed structural diversity of tetrameric procyanidins in apple was established. (C) 2012 Elsevier Ltd. All rights reserved.
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