guajavarin has been researched along with avicularin* in 3 studies
3 other study(ies) available for guajavarin and avicularin
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One new diphenylmethane glycoside from the leaves of Psidium guajava L.
To investigate the chemical constituents of Psidium guajava L, the EtOH/H(2)O extract of the fresh leaves was subjected to various chromatography. One diphenylmethane, one benzophenone, and eight flavonoids were isolated and elucidated as 2,6-dihydroxy-3-formaldehyde-5-methyl-4-O-(6″-O-galloyl-β-D-glucopyranosyl)-diphenylmethane (1), 2,6-dihydroxy-3,5-dimethyl-4-O-(6″-O-galloyl-β-D-glucopyranosyl)-benzophenone (2), kaempferol (3), quercetin (4), quercitrin (5), isoquercitrin (6), guaijaverin (7), avicularin (8), hyperoside (9), reynoutrin (10) by spectroscopic methods, including 1D and 2D NMR and HR-ESI-MS spectrometry as well as by comparison with published data. Compounds 5 and 10 are obtained from P. guajava for the first time, and compound 1 is a new diphenylmethane compound. Topics: Benzhydryl Compounds; Benzophenones; Flavonoids; Gallic Acid; Glucosides; Glycosides; Magnetic Resonance Spectroscopy; Molecular Structure; Plant Leaves; Psidium; Quercetin; Spectrometry, Mass, Electrospray Ionization | 2012 |
Inhibitory activity against urease of quercetin glycosides isolated from Allium cepa and Psidium guajava.
Methanolic extracts of edible plants and seaweeds were tested for their inhibitory activity against Jack bean urease. Quercetin-4'-O-beta-D-glucopyranoside was isolated from Allium cepa as a urease inhibitor with an IC(50) value of 190 microM-. Quercetin and two quercetin glycosides, avicularin and guaijaverin, were isolated from Psidium guajava as urease inhibitors with respective IC(50) values of 80 microM-, 140 microM-, and 120 microM-. Topics: Flavonoids; Methanol; Onions; Psidium; Quercetin; Rutin; Urease | 2010 |
Flavonoids and biological activities of Jussiaea repens.
A new acylated avicularin, namely avicularin 2''-(4'''-O-n-pentanoyl)-gallate (1) along with 12 metabolites have been isolated from the ethyl acetate extract of the aerial parts of Jussiaea repens L. (Onagraceae). Their structures were established as trifolin 2''-O-gallate (2), quercetrin (3), guaijaverin (4), reynoutrin (5), juglanin (6), avicularin (7), hyperin (8), trifolin (9), hyperin 2''-O-gallate (10), rutin (11), kaempferol (12) and quercetin (13) on the basis of their chromatographic properties, chemical and spectroscopic evidences. The investigated ethyl acetate extract was found to be non-toxic (LD(50) up to the maximum soluble dose 4 g kg(-1) body wt.) and had significant antioxidant, hepatoprotective, anti-inflammatory and antidiabetic activities. Also some of the isolated flavonoids showed cytotoxic activity against Ehrlich ascitis carcinoma cells. Topics: Animals; Anti-Inflammatory Agents; Antioxidants; Flavonoids; Galactosides; Hypoglycemic Agents; Kaempferols; Magnetic Resonance Spectroscopy; Male; Mice; Molecular Structure; Onagraceae; Plant Extracts; Quercetin; Rats | 2007 |