... 138-52-3 Major Components: Salicin Specifications:15%,25% White Willow Bark P.E. CAS:138-52-3Major Components: SalicinSpecifications:15%,25 ... Brief: white powderPharmacology: Salicin is the active ingredient of White Willow Bark P.E. It will be hydrolyzed in our bodies and ... ,such as headache, arthralgia, lumbago and back pain. White Willow Bark P.E can strengthen the stomach with bitterness and promote ...