Tannins and Related Compounds. XLI. : Isolation and Characterization of Novel Ellagitannins, Punicacorteins A, B, C, and D, and Punigluconin from the Bark of Punica granatum L.
Tannins and Related Compounds. XLI. : Isolation and Characterization of Novel Ellagitannins, Punicacorteins A, B, C, and D, and Punigluconin from the Bark of Punica granatum L.
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单宁和相关化合物。
DOI：
10.1248/cpb.34.656
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发表时间：
1986
影响因子：
1.7
通讯作者：
I. Nishioka
中科院分区：
文献类型：
--
作者：
Takashi Tanaka;G. Nonaka;I. Nishioka
对石榴木（Punica granatum L., Punicaceae）的树皮进行化学鉴定，分离出五种新的鞣花单宁，分别为槲皮皮质素A、B、C、D和punigluconin，以及已知的鞣花单宁、木麻黄素（casuariin）和木麻黄素（casuarinin）。基于化学和光谱证据，确定了punicacorteins A、B、C和D的结构为新型C-糖苷鞣花单宁，前者具有独特的四苯基（没食子酸酯）酯基（1和2），后两者含有没食子酸基（3和4），而punigluconin的结构为2,3 -二- o没食子酸- 4,6 -(S)-六羟基二酚葡萄糖酸(5)。
A chemical examination of the bark of Punica granatum L. (Punicaceae) has led to the isolation of five new ellagitannins, punicacorteins A, B, C and D, and punigluconin, together with the known ellagitannins, casuariin (6) and casuarinin (7). Based on chemical and spectroscopic evidence, the structures of punicacorteins A, B, C and D were established as novel C-glycosideic ellagitannins, the former two possessing a unique tetraphenyl (gallagyl) ester group (1 and 2), and the latter two containing a galloyl group in place of the gallagyl group (3 and 4), while punigluconin was characterized as 2, 3-di-O-galloyl-4, 6-(S)-hexahydroxydiphenoylgluconic acid (5).