xanthone

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xanthone

[′zan‚thōn]
(organic chemistry)
CO(C6H4)2O White needle crystals that are found in some plant pigments; insoluble in water, soluble in alcohol, chloroform, and benzene; melts at 173°C, sublimes at 350°C; used as a larvicide, as a dye intermediate, and in perfumes and pharmaceuticals.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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In this research, were observed as chemical constituents of ethanolic extract of propolis of Alagoas: Red flavonones, xanthones, triterpenoids pentaciclicos free, flavonols, cinnamic derivatives, fenilpropanoglicosideos, condensed anthocyanidins and leucoanthocyanidins.
Flavonoids and xanthones also have a strong selective inhibitory effect on MAO-A.
Anti-inflammatory xanthones from the twigs of Hypericum obongifolium Wall.
The chemical study of the Senna cana and Senna pendula ethanol extracts revealed the presence of anthraquinones, flavonoids, tannins, triterpenes, and xanthones, while hexane extracts presented positive results for anthraquinones and triterpenes.
Compound rt (min) PDA rt (min) QqQ Hydroxybenzoic acids (1) Shikimic acid 1.50 2.35 (2) Protocatechuic acid 5.99 6.80 (3) 4-Hydroxybenzoic acid 8.05 8.82 (4) Vanillic acid 9.04 9.82 (5) Syringic acid 9.31 10.06 Hydroxycinnamic acids (6) Quinic acid 1.51 2.28 (7) Chlorogenic acid 7.51 8.30 (8) Caffeic acid 9.09 9.85 (9) Coumaric acid 11.07 11.79 (10) Sinapic acid 11.65 12.36 (11) Ferulic acid 11.73 12.43 (12) 4,5-Dicaffeoylquinic 11.75 12.45 acid Xanthones (13) Mangiferin 8.83 9.62 Flavonols (14) Rutin 10.86 11.62 (15) Isoquercitrin 11.34 12.10 (16) Quercetin 15.25 16.01 (17) Kaempferol 17.16 17.89 Flavanones (18) Naringin 12.07 12.82 (19) Naringenin 16.86 17.53 Flavones (20) Linarin 12.43 13.22 (21) Luteolin 15.08 15.85 (22) Acacetin 16.08 17.03 (23) Apigenin 16.68 17.38 [[lambda].sub No.
Serrano-Lopez et al., "Antioxidant properties of xanthones from Calophyllum brasiliense: prevention of oxidative damage induced by FeS[O.sub.4]," BMC Complementary and Alternative Medicine, vol.
quercifolius aqueous extracts revealed the presence of phenols, flavones, flavonols, xanthones, catechins, triterpenoids, and tannins.
In the class of phenolic compounds, presence of metabolites anthraquinones, coumarins, tannins, xanthones and flavonoids (catechins, flavonols and flavanones) was verified.
oleifera seeds viewed the presence of ther compounds such as phenols, flavonones, flavonoids, xanthones and pentacyclic triterpenes.
Terada, "Antimicrobial activity of isoprenoid-substituted xanthones from Cudrania cochinchinensis against vancomycin-resistant enterococci," Phytomedicine, vol.
Briefly, alkaloids, anthraquinones, carotenoids, flavonoids, glycosides, saponins, tannins, and xanthones were detected by Dragendorff's reagent, ammonium hydroxide (N[H.sub.4]OH), sulfuric acid, Shinoda test, thin layer chromatography (TLC), Frothing test, ferric chloride (Fe[Cl.sub.3]), and potassium hydroxide (KOH), respectively.