... , allay fever, diminish inflammation, Salix alba (white willow; willow bark ) extract ,Ingredient: Salicin; Salicylic acid .Function: acesodyne,, allay fever, diminish inflammation ... bark is often in ethanol to produce a . The active extract of the bark, called , after the Latin name Salix, ... who then succeeded in separating out the acid in its pure state. Salicin.The bark of the white willow tree is ...