Patent ID: 7691425

Claim:
A method for producing isoquercitrin comprising the steps of: treating rutin with an enzyme having a naringin-degrading activity in the presence of at least one edible component selected from the group consisting of gelatin, wheat gluten, chitosan, lecithin, a glycerol fatty acid ester, xanthan gum, carrageenan, sodium chondroitin sulfate, casein, enzymatically decomposed gelatin, sodium alginate, konjac extract, gellan gum, guar gum, soybean protein, agar, pectin, yeast extract, egg-white peptide, cluster dextrin, gum arabic, arginine, sodium metaphosphate, karaya gum, locust bean gum, sodium pyrophosphate, glucosamine, chitin, sodium glutamate, dextrin, and trehalose, flour, rye, triticale, rice bran, wheat germ, soybean, wheat bran, adzuki bean, barley, foxtail millet, millet, Job's-tears, barnyard millet, corn starch, potato starch, and kudzu starch; and obtaining isoquercitrin from the matter treated above.