Antioxidant properties and structural analysis of phenolic glucosides from bark of <Emphasis Type="Italic">Populus ussuriensis</Emphasis> Kom. |
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| Authors: | Chuan-Ling Si Jin-Kyu Kim Young-Soo Bae Peng-Tao Liu Zhong Liu |
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| Institution: | (1) Tianjin Key Laboratory of Pulp and Paper, College of Material Science and Chemical Engineering, Tianjin University of Science and Technology, 300457 Tianjin, China;(2) State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, 51064 Guangzhou, People’s Republic of China;(3) Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, 510650 Guangzhou, China;(4) Department of Wood Science and Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon, 200-701, Korea |
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| Abstract: | The methanol (MeOH) extract of Populus ussuriensis Kom. bark was analyzed for antioxidant assessing by 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging potential. Among
fractions using several solvents, the ethyl acetate (EtOAc) soluble fraction, which showed strong antioxidant activity (IC50 2.02 ± 0.01 μg/ml), was further purified by Thin layer chromatography (TLC) guided Sephadex LH-20 column chromatography.
Three known phenolic glucosides, picein (I), salicortin (II), grandidentatin (III), and that of a new, 2-hydroxycyclohexyl-4′-O-p-coumaroyl-β-d-glucopyranoside (isograndidentatin A), were isolated and their structures were elucidated on the basis of physiochemical
and spectroscopic methods. This was the first report of the chemical composition of P. ussuriensis bark. Phenolic glucosides III and IV exhibited strong antioxidant activities, with IC50 values 6.73 ± 0.01 and 6.69 ± 0.01 μM, respectively, comparable to the control (α-tocopherol, IC50 6.80 ± 0.01 μM). P. ussuriensis bark EtOAc-soluble fraction and compounds III and IV could be used as biopreservatives in food applications as well as for cosmetic and medicinal preparations, to alleviate oxidative
stress. |
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