Tannins and related compounds. XCV. Isolation and characterization of helioscopinins and helioscopins, four new hydrolyzable tannins from Euphorbia helioscopia L. (1).
作者:Seung-Ho LEE、Takashi TANAKA、Gen-ichiro NONAKA、Itsuo NISHIOKA
DOI:10.1248/cpb.38.1518
日期:——
A chemical examination of polyphenols in Euphorbia helioscopia L. (Euphorbiaceae) has led to the isolation of four new hydrozable tannins named helioscopinins A (10) and B (9), and helioscopins A (11) and B (12), together with eight known tannins (1-8). On the basis of chemical and spectroscopic evidence, the structures of compounds 9-12 were established as 1, 6-(S)-hexahydroxydiphenoyl-3-O-galloyl-β-D-glucose, 1, 6-(S)-hexahydroxydiphenoyl-2, 4-(S)-dehydrohexahydroxydiphenoyl-3-O-galloyl-β-D-glucose, 1, 6-(S)-hexahydroxydiphenoyl-2, 4-(R)-elaeocarpusionoyl-3-O-galloyl-β-D-glucose and 1, 3, 6-tri-O-galloyl-2, 4-(R)-elaeocarpusinoyl-β-D-glucose, respectively.
对大戟科植物日照大戟(Euphorbia helioscopia L.)中的多酚进行了化学分析,分离出四种新的水解鞣酸,分别命名为helioscopinins A (10) 和 B (9),以及helioscopins A (11) 和 B (12),同时还发现了八种已知的鞣酸(1-8)。根据化学和光谱证据,化合物9-12的结构被确认分别为:1, 6-(S)-六羟基二苯酰基-3-O-鞣酸基-β-D-葡萄糖,1, 6-(S)-六羟基二苯酰基-2, 4-(S)-脱氢六羟基二苯酰基-3-O-鞣酸基-β-D-葡萄糖,1, 6-(S)-六羟基二苯酰基-2, 4-(R)-油青果酸-3-O-鞣酸基-β-D-葡萄糖和1, 3, 6-三-O-鞣酸基-2, 4-(R)-油青果酸-β-D-葡萄糖。