Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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DPPH Radical Scavenging Activity of Phenolic Compounds Isolated from the Stem Wood of Acer tegmentosum

산겨릅나무 목질부에서 분리한 페놀성 화합물의 DPPH 라디칼 소거활성

  • Kwon, Dong-Joo (Department of Forest Biomaterials Engineering, Kangwon National University) ;
  • Kim, Jin-Kyu (Institute of Natural Medicine, Hallym University) ;
  • Bae, Young-Soo (Department of Forest Biomaterials Engineering, Kangwon National University)
  • 권동주 (강원대학교 산림바이오소재공학과) ;
  • 김진규 (한림대학교 천연의학연구소) ;
  • 배영수 (강원대학교 산림바이오소재공학과)
  • Received : 2010.12.06
  • Accepted : 2011.01.12
  • Published : 2011.01.25
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Abstract

There have been few reports on the constituents and biological activity of stem bark of $Acer$ $tegmentosum$, and no phytochemical and biological studies have been reported for stem wood of $A.$ $tegmentosum$. Two flavan 3-ols (1 and 2), three phenolic acid/alcohols (3~5), and two coumarins (6 and 7) were isolated from the stem wood of $A.$ $tegmentosum$ by repeated column chromatography. The structure of isolated compounds were identified as (+)-catechin (1), (-)-epicatechin (2), $p$-hydroxybenzaldehyde (3), syringic alcohol (4), $p$-tyrosol (5), scopoletin (6), and cleomiscosin A (7) on the basis of spectroscopic evidences such as $^1H$-NMR, $^{13}C$-NMR, 2D-NMR and MS spectrum. $p$-Hydroxybenzaldehyde (3), syringic alcohol (4), scopoletin (6), and cleomiscosin A (7) have not been reported from this plant so far. (+)-Catechin (1) and (-)-epicatechin (2) showed the higher 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity than butylated hydroxyanisole (BHA) used as a positive control.

현재까지 산겨릅나무의 식물화학적인 연구는 수피부에 국한되어 있으며, 목질부의 성분연구는 전혀 보고된 것이 없다. 본 연구는 산겨릅나무 목질부로부터 2개의 flavan 3-ol, 3개의 phenolic acid/alcohol 및 2개의 coumarin 화합물을 컬럼크로마토그래피를 연속적으로 실시하여 분리하였다. 화합물의 구조는 $^1H$-NMR, $^{13}C$-NMR, 2D-NMR 및 MS 스펙트럼을 분석하여, (+)-catechin (1), (-)-epicatechin (2), $p$-hydroxybenzaldehyde (3), syringic alcohol (4), $p$-tyrosol (5), scopoletin (6) 및 cleomiscosin A (7)으로 동정하였으며, 그 중 $p$-hydroxybenzaldehyde (3), syringic alcohol (4), scopoletin (6) 및 cleomiscosin A (7)는 산겨릅나무에서는 처음 분리하였다. 화합물의 DPPH 라디칼 소거활성 측정 결과 (+)-catechin (1)과 (-)-epicatechin (2)은 양성 대조구로 사용한 BHA보다 우수한 항산화 활성을 나타냈다.

Keywords

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