Xi’an Biosep- White Willow Bark P.E.[Source] the stem and leaf of Salix alba[Specification] Salicin 15% 25% 30% 50%[Analysis Method] HPLC[Usage] White Willow Bark is an antifebrile, and has the function of easing pain, anti-rheumatism. It can be used in local anesthesia, be good to tonic stomach.