TANNINS AND RELATED-COMPOUNDS .117. ISOLATION AND CHARACTERIZATION OF 3 NEW ELLAGITANNINS, LAGERSTANNINS A, B AND C, HAVING A GLUCONIC ACID CORE, FROM LAGERSTROEMIA-SPECIOSA (L) PERS
TANNINS AND RELATED-COMPOUNDS .117. ISOLATION AND CHARACTERIZATION OF 3 NEW ELLAGITANNINS, LAGERSTANNINS A, B AND C, HAVING A GLUCONIC ACID CORE, FROM LAGERSTROEMIA-SPECIOSA (L) PERS
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DOI：
10.1248/cpb.40.2975
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发表时间：
1992-11-01
影响因子：
1.7
通讯作者：
NISHIOKA, I
中科院分区：
文献类型：
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作者：
TANAKA, T;TONG, HH;NISHIOKA, I
Lagerstannins A（6）、B（11）和C（8）是从大叶紫薇（Lagerstroemia speciosa（L.）PERS.（= L. flos-reginae REZZ.）（千屈菜科）。根据化学和光谱数据，确定它们的结构分别为2，3，4，6-bis-O-（S）-hexahydroxydiphenoyl-D-gluconic acid（6），2，3，5-O-（SR）-flavogallonyl-4，6-O-（S）-hexahydroxydiphenoyl-D-gluconic acid（11）和5-O-galloyl-4，6-O-（S）-hexahydroxydiphenoyl-D-gluconic acid（8）。此外，以前从石榴皮中分离出的鞣花单宁，punigluconin的结构，根据光谱重新检查，修订为2，5-二-O-没食子酰基-4，6-O-（S）-六羟基-二苯酰基-D-葡萄糖酸（10）。
Lagerstannins A (6), B (11) and C (8), ellagitannins having a gluconic acid core, have been isolated from the fruits and leaves of Lagerstroemia speciosa (L.) PERS. (= L. flos-reginae RETZ.) (Lythraceae). On the basis of chemical and spectroscopic evidence, their structures were established as 2,3,4,6-bis-O-(S)-hexahydroxydiphenoyl-D-gluconic acid (6), 2,3,5-0-(SR)-flavogallonyl-4,6-0-(S)-hexahydroxydiphenoyl-D-gluconic acid (11), and 5-0-galloyl-4,6-0-(S)-hexahydroxydiphenoyl-D-gluconic acid (8), respectively. Furthermore, the structure of an ellagitannin, punigluconin, previously isolated from the bark of Punica granatum L., was revised as 2,5-di-O-galloyl-4,6-0-(S)-hexahydroxy-diphenoyl-D-gluconic acid (10), based on spectral re-examination.