cytellin and ethyl-gallate

To isolate and elucidate the constituents from the fruit dregs of Rhus chinensis.. The constituents were isolated and purified by chromatography on silica gel,Sephadex LH-20, RP-C18 gel and recrystallization. The structures were elucidated on the basis of the chemical evidence and spectroscopic data.. Ten compounds were obtained: β-sitosterol (1), morolic acid (2), (2S) -1-O-heptatriacontanoyl glycerol (3), α-monpalmitin (4), palmitic acid (5), gallic acid (6), methyl gallate (7), ethyl gallate (8), propyl gallate (9), and protocatechuic acid (10).. Compounds 3, 4 and 9 are isolated from the plants of Rhus genus for the first time.

Topics: Fruit; Gallic Acid; Rhus; Sitosterols; Triterpenes

To study the chemical constituents in ethyl acetate fraction from the Euphorbia fischeriana.. The compounds were isolated by silica gel column chromatography and HPLC, and their structures were elucidated by means of spectral analyses.. Fourteen compounds were identified as 2,4-dihydroxy-6-methoxy-3-methylacetophenone (1), 12-deoxyphorbol-13-hexadecanoate (2), ethylgallate (3), esculetin (4), 2,4-dihydroxy-6-methoxy-acetophenone (5), 12-deoxyphorbol-13-acetate (6), 12-deoxyphorbol-13,20-diacetete (7), jolkinolide B (8), 17-hydroxyjolkinolide B (9), 17-hydroxy-jolkinolide A (10), langduin C (11), 3-methylp-hydroxybenzoic acid (12), methyl gallate (13), 3, 3'-diacetyl-pyridine-4,4'-dimethoxy-2, 2', 6, 6'-tetrahydroxydiphenylmethane (14).. Compounds 3, 5, 12, 13 are isolated from this plant for the first time.

Topics: Acetophenones; Chromatography, Thin Layer; Euphorbia; Gallic Acid; Nitrates; Plant Roots; Plants, Medicinal; Salicylates; Sitosterols

A fraction from the ethanol extract of the Peruvian medicinal plant Mauria heterophylla (Anacardiaceae) showed antibacterial activity against Escherichia coli 35992, Staphylococcus aureus 20213 and Pseudomonas aeruginosa 15442. Further fractionation led to the isolation and characterization of ethyl gallate as the antibacterial active compound.

Topics: Anacardiaceae; Anti-Bacterial Agents; Gallic Acid; Microbial Sensitivity Tests; Molecular Structure; Sitosterols

To study the chemical constituents from Ampelopsis humulifolia var. heterophylla (Thunb.) K. Koch.. Chromatography and spectroscopic analysis were employed to isolate and elucidate the chemical constituents in the plant.. Six compounds were isolated and elucidated as lupeol, beta-stiosterol, daucosterol, ethyl gallate, gallic acid and catechin.. The six compounds were isolated from this plant for the first time.

Topics: Ampelopsis; Catechin; Gallic Acid; Pentacyclic Triterpenes; Plant Roots; Plants, Medicinal; Sitosterols; Triterpenes