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Phenolic Compounds from the Fruits of Paulownia coreana Uyeki  

Si, Chuan-Ling (Dept. of Wood Science & Engineering, College of Forest Sciences, Kangwon National University)
Kim, Jin-Kyu (Dept. of Wood Science & Engineering, College of Forest Sciences, Kangwon National University)
Kwon, Dong-Joo (Dept. of Wood Science & Engineering, College of Forest Sciences, Kangwon National University)
Bae, Young-Soo (Dept. of Wood Science & Engineering, College of Forest Sciences, Kangwon National University)
Publication Information
Journal of the Korean Wood Science and Technology / v.34, no.1, 2006 , pp. 79-85 More about this Journal
Abstract
Paulownia coreana Uyeki fruits were collected, extracted with acetone-$H_2O$ (7:3, v /v), fractionated with n-hexane, methylene chloride, and ethyl acetate, then freeze dried to give some dark brown powder. The ethyl acetate soluble mixture was chromatographed on a Sephadex LH-20 column using a series of aqueous methanol and ethanol-hexane mixture as eluents. Spectrometric analysis such as NMR and MS including TLC were performed to establish the structures of the isolated compounds. From the ethyl acetate fraction, one phenolic acid (I) and five flavonoids (II~VI) and were isolated and elucidated. The antioxidative activities were tested on the isolated compounds, crude and fractionated extractives by DPPH radical scavenging method. The result showed that caffeic acid, kaempferol, luteolin, quercetin and the EtOAc soluble fraction exhibited higher activities than those of ${\alpha}$-tocopherol and BHT.
Keywords
antioxidative activity; column chromatography; flavonoid; paulownia coreana Uyeki; phenolic acid;
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Times Cited By KSCI : 4  (Citation Analysis)
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