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Phenolic Compounds from Barks of Ulmus macrocarpa and Its Antioxidative Activities  

Kwon, Young-Min (College of Pharmacy, Chung-Ang University)
Lee, Jae-Hee (College of Pharmacy, Chung-Ang University)
Lee, Min-Won (College of Pharmacy, Chung-Ang University)
Publication Information
Korean Journal of Pharmacognosy / v.33, no.4, 2002 , pp. 404-410 More about this Journal
Abstract
Phytochemical examination of Barks of Ulmus macrocarpa has led to the isolation and characterization of two fla-vanonol, taxifolin $7-O-{\beta}-D-glucopyranoside$ (1), taxifolin $3 (2), two flavanone eriodictyol $7-O-{\beta}-D-glucopyranoside$ (3), nalingenin $7-O-{\beta}-D-glucopyranoside$ (4), three flavan 3-ol, (+)-catechin (5), (-)-epicatechin (6), (+)-catechin 7-O-{\beta}-D-glucopyranoside (7) and one proanthocyanidin, procyanidin B-1 (8). Antioxidative activity of these compounds was determined by measuring the radical scavenging effect on 1,1-diphenyl-2- picrylhydrazyl (DPPH) radicals . (+)-Catechin (5) , (-)-epicatechin (6), (+)-catechin $7-O-{\beta}-D-glucopyranoside$ (7) and procyanidin B-1 (8) showed significant antioxidative activity.
Keywords
Ulmus macrocarpa; Flavonoid; Condensed Tannin; Antioxidative Activities;
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