CAS number: 3681-99-0 Assay (by HPLC): 80%,98%,99% Molecular Formula: C21H20O9 Molecular Weight: 416.37 Solubility: Soluble in Methanol, and slightly in Alcohol, but not soluble in Chloroform & Ether. Application: An effective pharmaceuticals in mind-brain & blood vessel disease cure.