Antioxidative flavan-3-ol glycosides from stems of Rhizophora stylosa.
Two flavan-3-ol glycosides together with seven flavan-3-ols were isolated from stems of the mangrove plant, Rhizophora stylosa. Their structures were established as glabraoside A (7) and glabraoside B (8) by spectroscopic and chemical methods. The antioxidative activity of these isolated compounds evaluated by the diphenylpicrylhydrazyl (DPPH) radical scavenging reaction was higher than that of L-ascorbic acid.
Takara
Kensaku
K
Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan. k-takara@agr.u-ryukyu.ac.jp
Kuniyoshi
Ayako
A
Wada
Koji
K
Kinjyo
Kazuhiko
K
Iwasaki
Hironori
H
D000975:Antioxidants / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry*; D043982:Rhizophoraceae / Q000737:chemistry*
D000975:Antioxidants; D005419:Flavonoids; D006027:Glycosides; C404987:flavan-3-ol