ABSTRACT
Objective: To study the chemical constituents in the leaves of Elaeagnus mollis. Methods: Their structures were identified on the basis of silica gel column chromatography and Sephadex LH-20 gel column chromatography, and HPLC methods were used for the separation and purification of chemical constituents. Results: Sixteen compounds were isolated from 70% ethanol extracts of the leaves of E. mollis. The structures were identified as kaempferol-3-O-β-D-glucopyranoside (1), kaempferol-3-O-(6″-O-trans-p-coumaroyl)-β-D- glucopyranoside (2), kaempferol-3-O-(6″-O-cis-p-coumaroyl)-β-D-glucopyranoside (3), quercetin-3-O-α-L-arabinopyranoside (4), kaempferol-7-O-α-L-rhamnopyranoside (5), kaempferol-3,7-di-O-α-L-rhamnopyranoside (6), kaempferol-3-O-β-D-galactopyranosyl-7- O-α-L-rhamnopyranoside (7), kaempferol-3-O-α-Larabinofuranosyl-7-O-α-L-rhamnopyranoside (8), hippophamide (9), L-tryptophan (10), arjunolicacid (11), ursolicacid (12), kaempferol (13), rutin (14), adenosine (15), and β-daucosterol (16). Conclusion: Compounds 3-10 and 15 are isolated from the plants of Elaeagnus L. for the first time. Compounds 1, 2, 11, and 12 are isolated from this plant for the first time.
ABSTRACT
Objective: To study the chemical constituents from the inflorescences of Tilia amurensis. Methods: The chemical constituents were separated and purified by silica gel, Sephadex LH-20, ODS column chromatographies, and preparative HPLC. Their structures were determined by physicochemical properties and spectral data. Results: Fourteen compounds were isolated from the ethyl acetate fraction of 70% ethanol extract in the inflorescences of T. amurensis, and identified as linarin (1), soquercitrin (2), quercetin (3), astragalin (4), tiliroside (5), 5, 7, 4'-trihydroxy-3'-methoxy isoflavone (6), orobol (7), quercetin-3-O-α-L- arabinopyranoside (8), friedelin (9), β-sitosterol (10), protocatechuic acid (11), theophylline (12), caffeine (13), and palm alcohol (14). Conclusion: Compounds 1-5, 7, 8, and 10-12 are isolated from this plant for the first time, and compound 7 is found in the plants of Tilia Linn. for the first time.
ABSTRACT
Objective: To investigate the chemical constituents in leaves of Ilex ficoidea. Methods: The various chromatographic techniques were used to isolate and purify the compounds and their structures were identified by the spectral data and physicochemical properties. Results: Sixteen compounds were isolated from 95% ethanol extract and identified as friedelan-3-one (1), 4-epifriedelin (2), lupeol (3), oleanolic acid (4), 3-acetoxy-oleanoic acid (5), 3β-acetoxy-6α, 13β-dihydroxyolean-7-one (6), 2-(4-hydroxybenzyl) malic acid (7), quercetin-3-O-α-L-arabinopyranoside (8), hyperoside (9), cis-syringin (10), ethyl-O-β-L-arabinopyranoside (11), emodin (12), chrysophanol (13), physcion (14), α-spinasterol (15), and β-sitosterol (16). Conclusion: All the compounds are isolated from the species for the first time, among which compounds 1, 2, 6-8, 12, and 13 are isolated from the plants in genus Ilex L. for the first time.