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Radical-Scavenging Compounds from Olive Tree (Olea europaea L.) Wood
- Pérez-Bonilla, Mercedes, Salido, Sofía, van Beek, Teris A., Altarejos, Joaquín
- Journal of agricultural and food chemistry 2014 v.62 no.1 pp. 144-151
- Olea europaea, antioxidant activity, butylated hydroxytoluene, chemical composition, ethyl acetate, free radical scavengers, glycosides, monoterpenoids, oleuropein, olives, trees, wood
- The purpose of this study was to complete knowledge on the chemical composition and radical-scavenging activity of olive tree wood. Two new monoterpene glycosides, (−)-oleuropeic acid 6′-O-α-d-glucopyranosyl ester (6a) and (−)-perillic acid 1′-O-β-d-primeverosyl ester (8), together with the known compounds (−)-oleuropeic acid (1), (−)-olivil (2), the aldehydic form of oleuropein aglycone (3), (+)-1-hydroxypinoresinol 1-O-β-d-glucopyranoside (4), (−)-oleuropeic acid 1′-O-β-d-glucopyranosyl ester (5), (−)-oleuropeic acid 6′-O-β-d-glucopyranosyl ester (6b), and (−)-olivil 4-O-β-d-glucopyranoside (7) were isolated from an ethyl acetate extract. The radical scavengers found (2–4 and 7) were detected and isolated with the help of the online HPLC-DAD-DPPH/ABTS technique. Compounds 2–4 and 7 displayed a higher antioxidative effect against the free radical DPPH than the reference BHT and lower than hydroxytyrosol, whereas compounds 1, 5, 6a, 6b, and 8 showed no activity.