Antioxidant constituents from Cotoneaster racemiflora

Abstract

A new lignan rhamnoside, racemiside (1), has been isolated from the ethyl acetate-soluble fraction of Cotoneaster racemiflora, along with scopoletin (2), 7,8-dimethoxy-6-hydroxycoumarin (3), 3,3′,4′-tri-O-methylellagic acid (4), and cereotagloperoxide (5), reported for the first time from this species. All of them showed profound antioxidative activities in the DPPH assay.

Keywords:

• Cotoneaster racemiflora
• Rosaceae
• antioxidant constituents

Acknowledgements

We are grateful to Higher Education Commission, Islamabad, for financial support to S. Khan under the Indigenous PhD Fellowship Program.