Phosphodiesterase-I inhibitor quinovic acid glycosides fromBridelia ndellensis

Abstract
Quinovic acid-3-O-α-l-rhamnopyranoside (1), quinovic acid-3-O-β-d-fucopyranoside (2), quinovic acid-3-O-β-d-glucopyranosyl (1 → 4)-β-d-fucopyranoside (3), methyl gallate (4) and ethyl gallate (5) were isolated from the ethyl acetate extract of Bridelia ndellensis barks by fractionation. Compounds 1–3 showed significant inhibitory activity against snake venom phosphodiesterase-I.