Structural characterization of a procyanidin tetramer and pentamer from the apple by low-temperature NMR analysis

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• 作者：Yutaka Abe ; Toshihiko Shoji ; Nobuo Kawahara ; Hiroyuki Kamakura ; Tomomasa K ; a ; Yukihiro Goda ; Yoshihiro Ozeki
• 关键词：Apple ; Condensed tannin ; NMR ; Oligomer ; Pentamer ; Procyanidin ; Tetramer ; Malus pumila
• 刊名：Tetrahedron Letters
• 出版年：2008
• 出版时间：3 November 2008
• 年：2008
• 卷：49
• 期：45
• 页码：6413-6418
• 全文大小：969 K

文摘

The structures of a procyanidin tetramer and pentamer from unripe apple (Malus pumila) were elucidated by low-temperature NMR analysis at −34 °C. These structures were [epicatechin-(4β→6)-epicatechin-(4β→8)-epicatechin-(4β→8)-epicatechin (1)] and [epicatechin-(4β→8)-epicatechin-(4β→8)-epicatechin-(4β→8)-epicatechin-(4β→8)-epicatechin (2)].