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KMID : 0620720060120040197
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Natural Product Sciences
2006 Volume.12 No. 4 p.197 ~ p.200
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Antioxidant Constituents from Leonurus japonicus
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Qu Guan-Zheng
Si Chuan-Ling
Wang Myeong-Hyeon
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Abstract
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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 α-tocopherol and BHT, which were used as controls.
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KEYWORD
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Aerial parts, antioxidant, constituents, Leonurus japonicus
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