METHOD OF PREPARING alpha-GLYCOSYLISOQUERCITRIN, INTERMEDIATE THEREFOR, AND BY-PRODUCT

摘要

A process for producing isoquercitrin, alpha-glycosylisoquercitrin, and rhamnose, characterized in that in yielding isoquercitrin from rutin, the step of treatment with an enzyme having naringin decomposition activity is conducted in the presence of an edible ingredient such as gelatin, starch gluten, chitosan, lecithin, a glycerol/fatty acid ester, or xanthane gum. By the process, isoquercitrin and alpha-glycosylisoquercitrin, which are useful as an antioxidant, fading inhibitor, flavor deterioration inhibitor, or the like, can be produced in high yield.