
Three novel phenylpropanoid glycosides 2, 5, 6 were isolated from water extract of Tabebuia avellanedae, together with three known phenylpropanoid glycosides 1, 3, 4. All compounds were identified on the basis of spectroscopic analysis and chemical methods and, for known compounds, by comparison with published data. All isolated compounds showed strong antioxidant activity in the DPPH assay, and compound 5 give the highest antioxidant activity among all compounds, with an IC50 of 0.12 µM. All compounds exhibited moderate inhibitory effect on cytochrome CYP3A4 enzyme.
<i>Tabebuia avellanedae</i> Lorentz ex Griseb; phenylpropanoid glycosides; antioxidant activity, Tabebuia avellanedae Lorentz ex Griseb, Plant Extracts, Propanols, antioxidant activity, Organic chemistry, Free Radical Scavengers, Tabebuia, Article, Antioxidants, QD241-441, Plant Bark, Cytochrome P-450 CYP3A Inhibitors, Glycosides, phenylpropanoid glycosides
<i>Tabebuia avellanedae</i> Lorentz ex Griseb; phenylpropanoid glycosides; antioxidant activity, Tabebuia avellanedae Lorentz ex Griseb, Plant Extracts, Propanols, antioxidant activity, Organic chemistry, Free Radical Scavengers, Tabebuia, Article, Antioxidants, QD241-441, Plant Bark, Cytochrome P-450 CYP3A Inhibitors, Glycosides, phenylpropanoid glycosides
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