Puerarin(4',7-dihydroxy-8-D-gluco-isoflavone) is one of important active components of pueraria lobato(Wild.) Ohwi, Pharmacological experiments showed that it had many effects to reduce blood vessel resistance,improve circulation of brain and coronary artery,reduce the quantum of oxygen consumed by cardiac muscle. Moreover,it had the advantages of little toxicity and quick metabolizability. However, the imperfect method of extraction and its bad solubility in fat solvent or water caused by its structure of ...