• Title/Summary/Keyword: picroside

Search Result 1, Processing Time 0.016 seconds

Isolation and Identification of a Sterol and Three Glucosides from the Peel of Pear (Pyrus pyrifolia Nakai cv. Chuhwangbae) (추황배(Pyrus pyrifolia Nakai cv. Chuhwangbae) 과피로부터 1종의 Sterol과 3종의 배당체 화합물의 단리 · 동정)

  • Lee, Yu Geon;Cho, Jeong-Yong;Lee, Hyun Joo;Lee, Yong Hyun;Lee, Sang-Hyun;Han, Tae-Ho;Kim, Wol-Soo;Park, Keun-Hyung;Moon, Jae-Hak
    • Korean Journal of Food Science and Technology
    • /
    • v.45 no.5
    • /
    • pp.557-564
    • /
    • 2013
  • We isolated and identified antioxidants from acidic and neutral ethyl acetate fractions of the peel of pear (Pyrus pyrifolia N. cv. Chuhwangbae). We isolated 4 compounds from the methanol extract, by using 3 different types of column chromatography (Sephadex LH-20, silica gel, and octadecylsilane) and preparative HPLC. We identified the isolated compounds as (S)-(+)-2-cis-abscisic acid O-${\beta}$-D-glucopyranosyl ester (compound 1), 1-[4-O-${\beta}$-D-glucopyranosyl]phenyl ethanone (picroside, compound 2), ${\beta}$-sitosterol (compound 3), and ${\beta}$-sitosteryl 3-O-${\beta}$-D-glucopyranoside (compound 4) by nuclear magnetic resonance analysis. We are the first to report the identification of compounds 1, 2, and 4 from pear.