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Molecules 2012, 17(9), 10724-10737; doi:10.3390/molecules170910724
Article

Phenolic Antioxidants Isolated from the Flowers of Osmanthus fragrans

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Received: 21 July 2012; in revised form: 21 August 2012 / Accepted: 5 September 2012 / Published: 7 September 2012
(This article belongs to the Section Metabolites)
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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.
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
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Hung, C.-Y.; Tsai, Y.-C.; Li, K.-Y. Phenolic Antioxidants Isolated from the Flowers of Osmanthus fragrans. Molecules 2012, 17, 10724-10737.

AMA Style

Hung C-Y, Tsai Y-C, Li K-Y. Phenolic Antioxidants Isolated from the Flowers of Osmanthus fragrans. Molecules. 2012; 17(9):10724-10737.

Chicago/Turabian Style

Hung, Chien-Ya; Tsai, Yu-Cheng; Li, Kuo-Yu. 2012. "Phenolic Antioxidants Isolated from the Flowers of Osmanthus fragrans." Molecules 17, no. 9: 10724-10737.



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