Abstract
A new rotenoid named 12-O-methylrotenolol along with five known rotenoid and isoflavone metabolites were isolated from the seeds of Dalbergia lanceolaria subsp. paniculata, collected from Egypt. The structures of these compounds were identified by physical and spectroscopic data measurements ([α]D, UV, 1D- and 2D-NMR and MS). The methanol extract of the seeds exhibited strong antioxidant activity with IC50 value 0.7 µg/µl against DPPH radical, in respect to quercetin as antioxidant reference (IC50 1.5 μM), while the tested compounds from this extract showed weak activities with IC50 values ranged from 19.6 to 33.0 µM.
Acknowledgements
The authors thank National Research Centre and Helwan University, Cairo, Egypt for their technical and financial support for this study.
Disclosure statement
No potential conflict of interest was reported by the authors.