Smooth muscle relaxing flavonoids from Alchornea cordifolia.

Alchornea cordifolia (Schum. & Thonn.) Muell. Arg. (Euphobiaceae) is widely distributed throughout tropical Africa, where it is used extensively in traditional medicine. Conditions for which the plant has enjoyed wide use are: coughs, gonorrhoea, yaws, ulcer, rheumatic pains, fever and bronchial troubles. This paper reports isolation of smooth muscle relaxing flavonoids from the leaves of the plant.