ABSTRACT
Objective To study the chemical constituents from Calystegia sepium. Methods The compounds were isolated and purified by silica gel column chromatography, Sephadex LH-20, ODS column chromatography, preparative HPLC and so on. Their structures were determined on the basis of physicochemical properties and their spectroscopic data, as well as literatures. Results A total of 20 compounds were separated and identified as tyrosol (1), quercetin-3-O-β-D-glucopyranoside (2), scutellarein-7-O-β- glucopyranoside (3), kaempferol-3-O-β-D-glucopyranoside (4), kaempferol-3-O-galactoside (5), kaempferol-3-O-β-robinobioside (6), nicotiflorin (7), rutin (8), uridine (9), tachioside (10), 2-methoxy-4-(2’-hydroxyethyl)-phenyl-1-O-β-D-glucopyranoside (11), 4-hydroxyphenethylol-4-O-β-D-glucopyranoside (12), polybotrin (13), pyridine-3,5-dicarboamide (14), skimmin (15), benzylalcohol-β-D-glucopyranoside (16), 5-hydroxyl-2-hydroxymethylpyridine (17), picein (18), 5-hydroxymethyl-furaldehyde (19), and sessiline (20). Conclusion Compounds 1-20 are isolated from Calystegia sepium for the first time.
ABSTRACT
Objective To investigate the chemical constituents of Mongolia medicine Hostae Flos (Flowers of Hosta plantaginea). Methods Chemical constituents of Mongolia medicine Hostae Flos were isolated and purified by Solvent method and chromatographic method. Their structures were elucidated on the basis of physio-chemical identification and spectral analysis. Results Twelve compounds were obtained from Hostae Flos. Their structures were identified as adenosine (1), kaempferol 3-O-β-D-glucopyranosyl (1→2)-β-D-glucopyranosyl-7-O-β-D-glucopyranoside (2), kaempferol-3-O-α-L-rhamnopyranosyl-(1→6)- β-D-glucopyranosyl-7-O-β-D-glucopyranoside (3), kaempferol 3-O-{β-D-glucopyranosyl-(1→2)-[α-L-rhamnopyranosyl-(1→6)]- β-D-glucopyranosyl}-7-O-β-D-glucopyranoside (4), kaempferol 3-O-β-D-glucopyranoside (5), hydroxybenzoic acid (6), hydroxyphenyl propionate (7), kaempferol 3-O-{β-D-glucopyranosyl (1→3)-[α-L-rhamnopyranosy-(1→6)]-β-D-glucopyranoside} (8), kaempferol 3-O-{β-D-glucopyranosyl (1→2)-[α-L-rhamnopyranosyl (1→6)]-β-D-glucopyranoside}(9), kaempfero-3,7-di-O-β-D-glucopyranoside (10), 7-methoxyl-kaempferol-3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranoside (11), and ursolic acid (12). Conclusion Compounds 2-4 and 9 are obtained from H. plamtaginea for the first time. Compounds 1, 5-8, 10-12 are isolated from the genus Hosta for the first time.
ABSTRACT
Objective To investigate the chemical constituents in the leaves of Camellia chrysantha. Methods The chemical constituents were separated and purified by silica gel, Sephadex LH-20 column chromatography, recrystallization, preparative HPLC and so on. Their structures were determined by physical constants and spectral analyses. Results Ten compounds were isolated and identified as 3,4-methylenedioxy-3′-O-methyl-4′-O-(6′-O-acetyl-glucoside) ellagic acid (1), oleanolic acid (2), α-spinasteryl-3- O-β-D-glycoside (3), n-dotriacontanol (4), okicamelliaside (5), 6-hydroxy-kaempferol-3-O-β-D-glucopyranoside (6), 3,4-O,O- methylidyne-ellagic acid (7), ellagic acid-4-O-β-D-glucopyranoside (8), 3,4-methylenedioxy-3'-O-methyl-4'-O-glucoside ellagic acid (9), and p-(hydroxymethyl) phenol 5-O-β-D-glucopyranosyl (1→2)-β-D-(4-O-p-coumaryl)-glucopyranoside (10). Conclusion Compound 1 is a new ellagic acid named camellia A. Compounds 4—10 are obtained from this plant for the first time.
ABSTRACT
Objective: To investigate the chemical constituents from Vitex negundo. Methods: The chemical constituents were separated and purified by column chromatography including ODS, Sephadex LH-20, and silica gel columns. Their structures were elucidated on the basis of physicochemical properties and spectral data. Results: Eleven compounds were identified as isoorientin (1), vitegnoside (2), luteolin-7-O-β-D-glucopyranoside (3), isovitexin (4), luetolin-3'-O-β-D-glucuronide (5), apigenin-7-O-β-D-glucoside (6), kaempferol-3-O-β-D-glucopyranoside (7), methyl rosmarinate (8), 5-O-caffeoyl quinic acid methylester (9), caffeic acid (10), and grevilloside G (11), respectively. Conclusion: Compounds 3 and 4 are isolated from V. negundo for the first time, and compounds 5-11 are firstly obtained from the plants of Vitex Linn.