Xanthone

About: Xanthone is a research topic. Over the lifetime, 1639 publications have been published within this topic receiving 25870 citations. The topic is also known as: 9-oxo-xanthene & Diphenyline ketone oxide.

Xanthone derivative having inhibitory action on inflammatory cytokine production, method for producing the same and food preparation, cosmetic and anti-inflammatory agent comprising the same

Abstract: PROBLEM TO BE SOLVED: To obtain a xanthone derivative that has a weak adverse effect and an excellent inhibitory action on inflammatory cytokine production, to provide a method for producing the same and a food preparation, a cosmetic and an anti-inflammatory agent comprising the same. SOLUTION: The xanthone derivative that has an inhibitory action on inflammatory cytokine production is a derivative obtained by combining xanthone with gluconic acid and a carboxylic acid. The xanthone derivative is acidic, permeates the skin, exhibits an excellent anti-inflammatory action and has high safety. The method for producing the xanthine derivative comprises a process of adding ground soybean and Bacillus natto to ground mangosteen, fermenting the mixture to give a fermented substance and extracting the fermented substance with an acidic aqueous solution. The food preparation and the cosmetic each comprises the xanthone derivative having an inhibitory action on inflammatory cytokine production and a fruit juice essence. The anti-inflammatory agent comprises the xanthone derivative. COPYRIGHT: (C)2009,JPO&INPIT

Notizen: A New Pentaoxygenated Xanthone from the Fern Cystopteris fragilis

Abstract: A new pentaoxigenated xanthone has been isolated from aerial parts of the fern Cystopteris fragilis. By spectroscopic and chemical methods this compound has been shown to be 1,6-dihydroxy-3,5,7-trimethoxyxanthone which is of biosynthetic interest in ferns.

Aldose reductase inhibitor comprising xanthones as active ingredient

Abstract: PURPOSE: To obtain an aldose reductase inhibitor useful for treating various complicating diseases in diabetes, comprising a specific xanthone as an active ingredient. CONSTITUTION: An aldose reductase inhibitor comprising a xanthone shown by the formula (R 1 and R 6 are OH, methoxyl or acetoxyl; R 2 and R 4 are H or methoxyl; R 3 and R 5 are H, OH, methoxyl or acetoxyl) as an active ingredient. The compound shown by the formula is obtained by extracting dried root of Polygala tenuifolia Willd., dried root of Polygala senega Linnaeus, Polygala tenuifolia Willd., Polygala senega Linnaeus, original plant thereof (Hirohasenega, Polygala senega L., var latifolida Torr. et Gray) or a homolugous plant thereof having expectorative action, hemolytic action and antiulcer action with an organic solvent such as ethanol or water at room temperature to the boiling point of the solvent and then partitioning the extract with water and a water- insoluble solvent such as benzene or n-hexane. COPYRIGHT: (C)1992,JPO&Japio