... bark ) extract, Salicin,acesodyne, salicylic acid, allay fever, diminish inflammation, Salix alba (white willow; willow bark ) extract ,Ingredient: Salicin; Salicylic acid . ... extract of the bark, called , after the Latin name Salix, was isolated to its crystalline form in 1828 by , ... , and an astringent. Specifically, it helps to relieve headaches Salix alba (white willow; willow bark ) extract