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- W1967432977 abstract "Water-soluble salvianolic acid A (Sal A) and salvianolic acid B (Sal B) were successfully isolated and purified from the crude extract of Salvia miltiorrhiza by high-speed counter-current chromatography (HSCCC). The solvent system was n-hexane–ethyl acetate–methanol–water (3:6:6:10, v/v/v/v). 4.27 mg of Sal A and 32.09 mg of Sal B were obtained from 260 mg of the crude sample. The purities of Sal A and Sal B were 96.67% and 97.43%, respectively. Their structures were identified by 1H NMR and 13C NMR. Antioxidant activities of Sal A and Sal B were also evaluated and compared by the methods of 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay and 2,2-azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid (ABTS+) radical cation decolourisation assay. Both Sal A and Sal B showed high radical scavenging activities with their EC50 values being 1.43 ± 0.09 and 1.81 ± 0.01 μg/ml in DPPH radical method. The ABTS results showed that Sal A and Sal B exhibited high total antioxidant activities, their EC50 values were 1.35 ± 0.00 and 1.43 ± 0.01 μg/ml, respectively." @default.
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- W1967432977 date "2009-03-01" @default.
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- W1967432977 title "Isolation and purification of salvianolic acid A and salvianolic acid B from Salvia miltiorrhiza by high-speed counter-current chromatography and comparison of their antioxidant activity" @default.
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- W1967432977 doi "https://doi.org/10.1016/j.jchromb.2009.02.013" @default.
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