TANNINS AND RELATED-COMPOUNDS .26. ISOLATION AND STRUCTURES OF STENOPHYLLANIN-A, STENOPHYLLANIN-B, AND STENOPHYLLANIN-C, NOVEL TANNINS FROM QUERCUS-STENOPHYLLA
TANNINS AND RELATED-COMPOUNDS .26. ISOLATION AND STRUCTURES OF STENOPHYLLANIN-A, STENOPHYLLANIN-B, AND STENOPHYLLANIN-C, NOVEL TANNINS FROM QUERCUS-STENOPHYLLA
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DOI：
10.1039/p19850000163
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发表时间：
1985-01-01
期刊：
影响因子：
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通讯作者：
NISHIOKA, I
中科院分区：
文献类型：
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作者：
NONAKA, G;NISHIMURA, H;NISHIOKA, I
从Q树皮中分离出3种特殊的鞣酸类化合物，即狭叶鞣酸A、B和C，并与已知的4种以D-葡萄糖的开链形式为核心的鞣酸类化合物（Escherarinin、Escherariin、castalagin和castalin）结合。狭叶植物降解和合成的研究，结合1H NMR，13 C NMR和质谱，导致明确的归属的结构，其中鞣花单宁（紫茎泽兰素或紫茎泽兰素）部分是通过CC连接到A-环（C-8或C-6）的黄烷-3-醇[（+）-儿茶素]单元。
Together with 4 known ellagitannins (casuarinin, casuariin, castalagin and castalin) containing the core of an open-chain form of D-glucose, 3 unusual and closely related tannins, stenophyllanins A, B and C, were isolated from the bark of Q. stenophylla. Degradative and synthetic studies, in conjunction with 1H NMR, 13C NMR and mass spectrometry, led to the unequivocal assignments of the structures in which an ellagitannin (casuarinin or casuariin) moiety is attached through a CC linkage to the A-ring (C-8 or C-6) of a flavan-3-ol [(+)-catechin] unit.