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KMID : 0380620150470020170
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Korean Journal of Food Science and Technology
2015 Volume.47 No. 2 p.170 ~ p.175
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Isolation and Identification of Two Flavonoids from Pear (Pyrus pyrifolia Nakai cv. Chuhwangbae) Fruit Peel
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Lee Sang-Won
Lee Yu-Geon
Cho Jeong-Yong
Kim Young-Chool
Lee Sang-Hyun
Kim Wal-Soo
Moon Jae-Hak
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Abstract
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The methanol extract of Asian pear (Pyrus pyrifolia N. cv. Chuhwangbae) fruit peel was purified using solvent fractionation, Sephadex LH-20 column chromatography, and octadecylsilane high performance liquid chromatography. Based on the electrospray ionization mass spectrometry and nuclear magnetic resonance data, the two isolated compounds were identified as quercetin 3-O-β-D-glucopyranoside (1) and 3,5,6,7,8,3',4'-heptahydroxyflavan [(?)-dulcisflavan, 2]. Compounds 1 and 2 were isolated and identified for the first time from Asian pears and pears, respectively.
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KEYWORD
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Pyrus pyrifolia, pear fruit peel, flavonoid, dulcisflavan, antioxidative activity
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