Phenolic Antioxidants Isolated from the Flowers of Osmanthus fragransReport as inadecuate




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Department of Food Nutrition, Chung Hwa University of Medical Technology, No.89, Wenhua 1st St., Rende Dist., Tainan City 71703, Taiwan





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Abstract O. fragrans has slightly less antioxidative activity than green tea. Five phenolic compounds, tyrosyl acetate 1, +-phillygenin 2, 8E-ligustroside 3, rutin 4, and verbascoside 5, were isolated from the CHCl3 sub-extract of O. fragrans. The structures were elucidated by interpreting their spectral data. Evaluation of the antioxidative property of the isolated +-phillygenin 2, rutin 4, and verbascoside 5 revealed strong DPPH radical scavenging activity, with IC50 values of 19.1, 10.3, and 6.2 μM, respectively. These isolates also exhibited an H2O2 scavenging ability, with IC50 values of 10.5, 23.4, and 13.4 μM, respectively. View Full-Text

Keywords: Osmanthus fragrans; Oleaceae; antioxidative activity; DPPH scavenging activity; H2O2 scavenging ability; phenolic antioxidant Osmanthus fragrans; Oleaceae; antioxidative activity; DPPH scavenging activity; H2O2 scavenging ability; phenolic antioxidant





Author: Chien-Ya Hung * , Yu-Cheng Tsai and Kuo-Yu Li

Source: http://mdpi.com/



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