The study was based on the results of pharmacological screening. The effective components in Huzhang (Polygonum cuspidatum Sieb.et Zucc.) that can dispel Blood stasis and stop pain were studied. We gained a monomer by extraction,isolation,refinement and purification with the techniques and methods of chemistry of TCM. This monomer was identified as Resveratrol after being measured by UV,IR. NMR. MS and compared with references. Cardiovascular disease is frequently happened among people. Patients ...