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首页> 外文期刊>Journal of Agricultural and Food Chemistry >Antioxidant compounds from the leaves of Peucedanum japonicum Thunb
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Antioxidant compounds from the leaves of Peucedanum japonicum Thunb

机译:白头翁叶中的抗氧化剂化合物

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Seventeen compounds were isolated from the n-butanol soluble fraction of the leaves of Peucedanum japonicum Thunb. On the basis of MS and various NMR spectroscopic techniques, the structures of the isolated compounds were determined as isoquercitrin (1), rutin (2), 3-O-caffeoylquinic acid (3), 4-O-caffeoylquinic acid (4), 5-O-caffeoylquinic acid (5), cnidioside A (6), praeroside II (7), praeroside III (8), apterin (9), esculin (10), (R)-peucedanol (11), (R)-peucedanol 7-O-beta-D-glucopyranoside (12), L-tryptophan (113), uracil (114), guanosine (115), uridine (116), and thymidine (117). All compounds except 11 and 12 were isolated for the first time from P. japonicum. Several isolated compounds were quantified by high-performance liquid chromatography analysis. In addition, all isolated compounds were examined for radical scavenging on 1,1-diphenyl-2-picrylhydrazyl radical and for inhibition of oxidation of liposome induced by 2,2'-azobis(2-amidinopropane)dihydrochloride. Compounds 2-5 were found to be the major potent constituents, which contribute to the antioxidant activity of P. japonicum leaves.
机译:从百日草叶子的正丁醇可溶级分中分离出十七种化合物。根据MS和各种NMR光谱技术,确定了分离的化合物的结构,分别为异槲皮苷(1),芦丁(2),3-O-咖啡酰奎尼酸(3),4-O-咖啡酰奎尼酸(4), 5-O-咖啡酰奎尼酸(5),菊苣苷A(6),苦味苷II(7),苦味苷III(8),apterin(9),七叶皂苷(10),(R)-peucedanol(11),(R) -腰果酚7-O-β-D-吡喃葡萄糖苷(12),L-色氨酸(113),尿嘧啶(114),鸟苷(115),尿苷(116)和胸苷(117)。除11和12外,所有化合物均为首次从日本假单胞菌中分离得到。通过高效液相色谱分析定量了几种分离的化合物。另外,检查了所有分离的化合物对1,1-二苯基-2-吡啶并肼基的自由基清除作用以及对2,2′-偶氮二(2-ami基丙烷)二盐酸盐诱导的脂质体氧化的抑制作用。发现化合物2-5是主要的有效成分,其有助于日本梧桐叶的抗氧化活性。

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