The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 1996
Filed:
Feb. 15, 1995
Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo, Okayama, JP;
Abstract
A novel .alpha.-glycosyl quercetin, wherein at least equimolar D-glucose residues are attached to quercetin via the .alpha.-bond, has a satisfactory water-solubility, light tolerance and stability, and exerts the inherent activity of quercetin in vivo. The .alpha.-glycosyl quercetin is prepared by a process comprising subjecting a solution containing quercetin and an .alpha.-glucosyl saccharide to the action of a saccharide-transferring enzyme to form an .alpha.-glycosyl quercetin, and recoverying the resultant .alpha.-glycosyl quercetin. The .alpha.-glycosyl quercetin can be advantageously used in combination with other materials in food products, cosmetic compositions and pharmaceutical compositions as a highly-safe and natural vitamin P-enriched agent, yellow-color-imparting agent, antioxidant, deodorant, stabilizer, quality-improving agent, antiseptic, prophylactic agent, therapeutic agent and ultraviolet-absorbing agent.