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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)
Publication Information
Natural Product Sciences / v.12, no.4, 2006 , pp. 197-200 More about this Journal
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
Aerial parts; antioxidant; constituents; Leonurus japonicus;
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