Omar, M.H., Mullen, W. and Crozier, A. (2011) Identification of proanthocyanidin dimers and trimers, FlavoneC-Glycosides, and antioxidants in Ficus deltoidea, a Malaysian herbal tea. Journal of Agricultural and Food Chemistry, 59(4), pp. 1363-1369. (doi: 10.1021/jf1032729)
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Publisher's URL: http://dx.doi.org/10.1021/jf1032729
Abstract
Phenolic compounds in an aqueous infusion of leaves of Ficus deltoidea (Moraceae), a well-known herbal tea in Malaysia, were analyzed by HPLC coupled to photodiode array and fluorescence detectors and an electrospray ionization tandem mass spectrometer. Following chromatography of extracts on a reversed phase C12 column, 25 flavonoids were characterized and/or tentatively identified with the main constituents being flavan-3-ol monomers, proanthocyanidins, and C-linked flavone glycosides. The proanthocyanidins were dimers and trimers comprising (epi)catechin and (epi)afzelechin units. No higher molecular weight proanthocyanidin polymers were detected. The antioxidant activity of F. deltoidea extract was analyzed using HPLC with online antioxidant detection. This revealed that 85% of the total antioxidant activity of the aqueous F. deltoidea infusion was attributable to the flavan-3-ol monomers and the proanthocyanidins
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Crozier, Professor Alan and Mullen, Dr Bill |
| Authors: | Omar, M.H., Mullen, W., and Crozier, A. |
| College/School: | College of Medical Veterinary and Life Sciences > School of Life Sciences |
| Journal Name: | Journal of Agricultural and Food Chemistry |
| ISSN: | 0021-8561 |
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