Natural Product Sciences

The Korean Society of Pharmacognosy (한국생약학회)
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Antioxidant Constituents from Leonurus japonicus

  • Qu, Guan-Zheng (School of Biotechnology, Kangwon National University) ;
  • Si, Chuan-Ling (Tianjin Key Laboratory of Pulp & Paper, Tianjin University of Science & Technology) ;
  • Wang, Myeong-Hyeon (School of Biotechnology, Kangwon National University)
  • Published : 2006.12.30
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Abstract

Two phenolic acids, gallic acid (1) and syringic acid (2), and five flavonoids, apigenin (3), luteolin (4), kaempferol (5), quercetin (6), and myricetin (7), were isolated from the aerial parts of Leonurus japonicus. Their structures were elucidated by chemical and spectral analysis. The antioxidant activities of the crude extracts, partitioned fractions and isolated compounds were evaluated by DDPH free radical-scavenging assay. Results suggested that the EtOAc partitioned fraction and compounds 1, 4, 5, 6, and 7 showed significantly high antioxidant potential compared with $\alpha-tocopherol$ and BHT, which were used as controls.

Keywords

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