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Antioxidative Phenolic Compounds from the Whole Plant of Juncus diastrophanthus
Park, Sae-Rom,Yang, Seok-Won,Ahn, Dal-Rea,Yang, Jae-Heon,Kim, Dae-Keun The Korean Society for Applied Biological Chemistr 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.5
Methanol extract of Juncus diastrophanthus (Juncaceae) was found to show potent antioxidant activity. Subsequent activity-guided fractionation of methanol extract of J. diastrophanthus led to the isolation of seven flavonoid compounds, isorhamnetin-3-O-${\alpha}$-L-rhamnopyranosyl(1${\rightarrow}$6)-${\beta}$-D-glucopyranoside, narcissin (1), quercetin-3-O-${\alpha}$-L-rhamnopyranosyl(1${\rightarrow}$6)-${\beta}$-D-glucopyranoside, rutin (2), kaempferol-3-O-${\alpha}$-L-rhamnopyranosyl(1${\rightarrow}$6)-${\beta}$-D-glucopyranoside (3), quercetin (4), quercetin-3-O-${\alpha}$-L-rhamnopyranoside, quercitrin (5), quercetin-3-O-${\beta}$-D-xylopyranoside (6), and luteolin (7). These compounds were isolated for the first time from this plant. Compounds 4 and 7 showed significant antioxidative effects on 1,1-diphenyl-2-picrylhydrazyl, and compound 5 showed significant riboflavin-originated superoxide and xanthine-originated superoxide quenching activities.
Antioxidative Phenolic Compounds from the Whole Plant of Juncus diastrophanthus
( Sae Rom Park ),( Seo Kwon Yang ),( Dal Rea Ahn ),( Jae Heon Yang ),( Dae Keun Kim ) 한국응용생명화학회 2011 Applied Biological Chemistry (Appl Biol Chem) Vol.54 No.5
Methanol extract of Juncus diastrophanthus (Juncaceae) was found to show potent antioxidant activity. Subsequent activity-guided fractionation of methanol extract of J. diastrophanthus led to the isolation of seven flavonoid compounds, isorhamnetin-3-O-α-L-rhamnopyranosyl(1→6)-β-Dglucopyranoside, narcissin (1), quercetin-3-O-α-L-rhamnopyranosyl(1→6)-β-D-glucopyranoside, rutin (2), kaempferol-3-O-α-L-rhamnopyranosyl(1→6)-β-D-glucopyranoside (3), quercetin (4), quercetin-3-O-α-L-rhamnopyranoside, quercitrin (5), quercetin-3-O-β-D-xylopyranoside (6), and luteolin (7). These compounds were isolated for the first time from this plant. Compounds 4 and 7 showed significant antioxidative effects on 1,1-diphenyl-2-picrylhydrazyl, and compound 5 showed significant riboflavin-originated superoxide and xanthine-originated superoxide quenching activities.