Screening of EtOAc soluble fraction of Plantago asiatica (Plantaginaceae) using HPLC-MS/MS coupled DPPH online assay suggested the presence of antioxidant compounds, which characterized as phenylethanoid glycosides. Twenty-nine compounds including three new compounds, plantalides A-C, a phenylethanoid (1), a phenolic compound (9) and an iridoid (10), were isolated from P. asiatica. Consistent with HPLC-MS/MS analysis, seven phenylethanoid glycosides (1-7) including a new phenylethanoid glycoside (1) showed antioxidant with ranging IC50 values of 22.9-88.5 mu M. These results suggested that phenylethanoid glycosides were contributed to the antioxidant activity of P. asiatica and HPLC-MS/MS coupled online assay is powerful tool for predicting active compounds with short time and limited amounts.
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Univ Colorado, Dept Anesthesiol, Aurora, CO 80045 USAUniv Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Klawitter, Jelena
Zhang, Yan Ling
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Univ Colorado, Dept Anesthesiol, Aurora, CO 80045 USAUniv Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Zhang, Yan Ling
Klawitter, Jost
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Univ Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Eurofins Medinet Denver, Aurora, CO 80045 USAUniv Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Klawitter, Jost
Anderson, Nora
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Univ Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Ctr Drug Res & Med Biotechnol, Fraunhofer Inst Toxicol & Expt Med, Hannover, GermanyUniv Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Anderson, Nora
Serkova, Natalie J.
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Univ Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Univ Colorado, Ctr Canc, Aurora, CO 80045 USAUniv Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Serkova, Natalie J.
Christians, Uwe
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Univ Colorado, Dept Anesthesiol, Aurora, CO 80045 USA
Eurofins Medinet Denver, Aurora, CO 80045 USAUniv Colorado, Dept Anesthesiol, Aurora, CO 80045 USA