Huang Yu-Ling, Yeh Pei-Yu, Shen Chien-Chang, Chen Chien-Chih
National Research Institute of Chinese Medicine, No. 155-1, Sec. 2, Li Nung St. Peitou, Taipei, Taiwan, Republic of China.
Phytochemistry. 2003 Dec;64(7):1277-83. doi: 10.1016/j.phytochem.2003.09.009.
Eight flavonoids, ugonins E-L (1-8), were isolated from the rhizomes of Helminthostachys zeylanica, and their structures were established on the basis of spectral evidence. Compounds 3-8 were evaluated for their antioxidative activity in the 1, 1-diphenyl-2-picrylhydrazyl (DPPH) assay. Compounds 6, 7 and 8 were more active than Trolox, with IC20 values of 5.29 +/- 0.32, 7.23 +/- 0.22, and 7.93 +/- 0.31, respectively.
从七指蕨的根茎中分离出了8种黄酮类化合物，乌冈宁E-L（1-8），并根据光谱证据确定了它们的结构。采用1,1-二苯基-2-苦基肼（DPPH）法对化合物3-8的抗氧化活性进行了评估。化合物6、7和8的活性高于Trolox，其IC20值分别为5.29±0.32、7.23±0.22和7.93±0.31。
