3-methylquercetin and protocatechuic-acid

Topics: Antioxidants; Benzaldehydes; Brazil; Chromatography, High Pressure Liquid; Color; Flavanones; Flavones; Flavonoids; Gallic Acid; Hydroxybenzoates; Phenols; Phenylpropionates; Propolis; Quercetin; Tandem Mass Spectrometry; Vanillic Acid

To investigate the chemical constituents from Commelina communis, fifteen compounds were separated and purified by silica gel, Sephadex LH-20, and ODS column chromatography, and semi-preparative HPLC. By analyses of NMR and MS data as well as their physical and chemical properties, the structures of these compounds were identified as chrysoeriol-7-O-beta-D-glucoside( 1), methyl gallate(2), p-coumaric acid(3), protocatechuic acid(4), caffeic acid(5), p-hydroxybenzoic acid(6), 2-phenethyl-beta-D-gly-cosidase(7) , rhaponticin(8) , (7S, 8R) -dihydrodehydrodiconiferyl alcohol-9-O-beta-D-glucoside (9), isovitexin (10) , isofurcatain (11), isorhamnetin-3-O-beta-D-glucoside(12) , quercetin-3-O-alpha-L-rhamnoside (13) , isoquercitrin (14) , and 1, 2-dihydro-6, 8-dime-thoxy-7-1-(3, 5-dimethoxy-4-hydroxyphenyl) -N1, N2-bis-[2-( 4-hydroxyphenyl) ethyl] -2, 3-naphthalene dicarboxamide (15). Compounds 2, 5-9, 11, 13 were obtained from the genus Commelina for the first time.

Topics: Caffeic Acids; Chromatography, High Pressure Liquid; Commelina; Glucosides; Hydroxybenzoates; Quercetin

To study the chemical constituents in the medicative part of Sorbaria sorbifolia.. By means of silica gel re-chromatography and thin layer chromatography, chemical constituents from the CHCl3 and EtOAc extract of the medicative part of S. sorbifolia were studied and their structures were identified by their physical-chemical constants, spectral analysis and comparison with the authorized samples.. Eight compounds were obtained and identified as follows: noreugenin (I), wogonin (II), 5,7,3',4'-tetrahydroxy-3-methoxyflavone (III), protocatechuic acid (IV), benzoic acid (V), p-hydroxy benzoic acid (VI), emodin (VII) and daucosterol (VIII).. All of the compounds were isolated from this genus for the first time.

Topics: Flavanones; Flavonoids; Flavonols; Hydroxybenzoates; Plant Components, Aerial; Plants, Medicinal; Quercetin; Rosaceae