Tannins and related compounds. XL. Revision of the structures of punicalin and punicalagin, and isolation and characterization of 2-O-galloylpunicalin from the bark of Punica granatum L.
作者:TAKASHI TANAKA、GEN-ICHIRO NONAKA、ITSUO NISHIOKA
DOI:10.1248/cpb.34.650
日期:——
The structures of punicalin and punicalagin, isolated from the bark of Punica granatum L. (pomegranate), have been revised to 4, 6-(S, S)-gallagyl-D-glucose (1) and 2, 3-(S)-hexahydroxy-diphenoyl-4, 6-(S, S)-gallagyl-D-glucose (2), respectively, on the basis of chemical and spectroscopic evidence. In addition, a new hydrolyzable tannin, 2-O-galloyl-4, 6-(S, S)-gallagyl-D-glucose (3) was isolated from the same plant source, and characterized.
从石榴(Punica granatum L.)树皮中分离出的石榴素(punicalin)和石榴单宁(punicalagin)在化学和光谱证据的基础上,结构已修订为4, 6-(S, S)-鞣酸基-D-葡萄糖(1)和2, 3-(S)-六羟基二苯酰-4, 6-(S, S)-鞣酸基-D-葡萄糖(2)。此外,还从同一植物源中分离出一种新的可水解单宁,2-O-鞣酸基-4, 6-(S, S)-鞣酸基-D-葡萄糖(3),并进行了表征。