Flavonoids is a large number of the active ingredients of chinese herbal medicine, It has wide range of physiological activity, thus in recent years, universal attention by researcher. Ampleopsin belongs to a kind of flavonoids, which shows very high biological activities. It can be used as food preservative and antioxidant in food industry. Now the research is focusing on DMY is about pharmacological aspect. In order to make the best use of DMY, it is very necessary to investigate the stability of ampleops...