Three quercetin glucosides were isolated from flower buds of Japanese butterbur (Petasites japonicus subsp. gigantea Kitam.) together with caffeic acid as the ingredients that had DPPH radical scavenging activity, using the DPPH-HPLC method for measuring the radical scavenging activity. These quercetin glucosides were identified as quercetin 3-O-beta-D-glucoside, quercetin 3-O-beta-D-6''-O-acetylglucoside
使用DPPH-HPLC方法测定了三叶草(Petasites japonicus subsp。gigantea Kitam。)的花蕾中的三种槲皮素葡糖苷,以及咖啡酸作为具有DPPH自由基清除活性的成分。这些槲皮素糖苷被鉴定为槲皮素3-O-β-D-葡糖苷,槲皮素3-O-β-D-6''-O-乙酰基葡萄糖苷和芦丁,并且还通过以下方法检查了花蕾中糖苷的含量: HPLC。从四个不同的位置收获花蕾,每个位置中的槲皮素苷的总量为100-170 mg / 100 g fr。重量,并且生长田间的量没有很大差异。
Zemplen et al., Chemische Berichte, 1928, vol. 61, p. 2492
作者:Zemplen et al.
DOI:——
日期:——
Phenolic metabolites from rooibos tea (Aspalathus linearis)
作者:Charlene Rabe、Jacobus A. Steenkamp、Elizabeth Joubert、Johann F.W. Burger、Daneel Ferreira
DOI:10.1016/s0031-9422(00)86894-6
日期:1994.4.19
The processed leaves and stems of Aspalathus linearis contain hydroxylated benzoic and cinnamic acids, luteolin, chrysoeriol, quercetin, isoquercitrin, the C-C linked beta-D-glucopyranosides based on four flavones and the dihydrochalcone aspalathin.
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作者:A. Malik、M. P. Yuldashev、A. Obid、T. Ismoil、L. Ya. Ping