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Flavonoid Constituents and Their Antioxidant Activity of Laportea bulbifera Weddell  

Yang, Min-Cheol (Natural Products Laboratory, College of Pharmacy, SungKyunKwan University)
Choi, Sang-Zin (Natural Products Laboratory, College of Pharmacy, SungKyunKwan University)
Lee, Sung-Ok (Natural Products Laboratory, College of Pharmacy, SungKyunKwan University)
Chung, Ae-Kyung (Natural Products Laboratory, College of Pharmacy, SungKyunKwan University)
Nam, Jung-Hwan (Natural Products Laboratory, College of Pharmacy, SungKyunKwan University)
Lee, Kyu-Ha (Natural Products Laboratory, College of Pharmacy, SungKyunKwan University)
Lee, Kang-Ro (Natural Products Laboratory, College of Pharmacy, SungKyunKwan University)
Publication Information
Korean Journal of Pharmacognosy / v.34, no.1, 2003 , pp. 18-24 More about this Journal
Abstract
The repeated column chromatographic separation of the MeOH extract of Laportea bulbifera Weddell resulted in the isolation of five flavonoids. Structures of the isolated compounds have been identified as $isorhamnetin-7-O-{\alpha}-L-rhamnoside$ (1), $isorhamnetin-3-O-{\alpha}-L-rhamnoside$ (2), $isorhamnetin-3,7-O-{\alpha}-L-dirhamnoside$ (3), $isorhamnetin-3-O-{\alpha}-L-rhamnopyranosyl-(1{\rightarrow}2)-{\beta}-galactopyranoside$ (4), $isorhamnetin-3-O-{\alpha}-rhamosyl-(1{\rightarrow}2)-rhamnoside$ (5) by spectroscopic means.
Keywords
Laportea bulbifera Weddell; flavonoid; $isorhamnetin-7-O-{\alpha}-rhamnoside$; $isorhamnetin-3-O-{\alpha}-rhamnoside$; $isorhamnetin-3,7-O-{\alpha}-dirhamnoside$; $isorhamnetin-3-O-{\alpha}-rhamnopyranosyl-(1{\rightarrow}2)-{\beta}-galacto-pyranoside$; $isorharmnetin-3-O-{\alpha}-rhamnosyl-(1{\rightarrow}2)-rhamnoside$;
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