Isolation and Identification of 3-Methoxy-4-hydroxybenzoic acid and 3-Methoxy-4-hydroxycinnamic acid from Hot Water Extracts of Hovenia dulcis Thunb and Confirmation of Their Antioxidative and Antimicrobial Activity

헛개나무 열수추출물로부터 항산화 및 항미생물 활성을 갖는 3-methoxy-4-hydroxybenzoic acid 와 3-methyoxy-4-hydroxycinnamic acid의 분리 및 동정

  • Cho, Jeong-Yong (Department of Food Science and Technology, Chonnam National University) ;
  • Moon, Jae-Hak (Department of Nutrition, University of Tokushima, Japan) ;
  • Park, Keun-Hyung (Department of Food Science and Technology, Chonnam National University)
  • 조정용 (전남대학교 식품공학과) ;
  • 문제학 (일본 덕도대학 의학부 영양학과) ;
  • 박근형 (전남대학교 식품공학과)
  • Published : 2000.12.30

Abstract

The methanol soluble fraction of the hot water extracts from Hovenia dulcis Thunb showed antioxidative and antimicrobial activity. The methanol fraction was successively purified with solvent fractionation, silica gel adsorption column chromatography, Sephadex LH-20 column chromatography, and octadecylsilane column chromatography. The purified active substances were isolated by high performance liquid chromatography. The isolated substances were identified as 3-methoxy-4-hydroxybenzoic acid (vanillic acid) and 3-methoxy- 4-hydroxycinnamic acid (ferulic acid) by LC-MS and GC-MS. Vanillic acid and ferulic acid showed antimicrobial activity against Gram-positive bacteria, Gram-negative bacteria and yeast. The DPPH-radical scavenging activity of ferulic acid appeared more active than that of vanillic acid. DPPH-radical scavenging concentration of ferulic acid and vanillic acid were $14\;{\mu}g/mL\;(SC_{50})$, $100\;{\mu}g/mL\;(SC_{10})$, respectively.