Showing papers on "Glucoside published in 1989"
TL;DR: In this paper, five antioxidative phenolic acids were isolated from the leaves of oregano (Origanum vulgare L.), and the structure of a new compound (5a) was determined to be 2-caffeoyloxy-3-[2-(4-hydroxybenzyl)- 4,5-dihydroxy]phenylpropionic acid on the basis of spectroscopic evidence.
Abstract: Five antioxidative phenolic acids were isolated from the leaves of oregano (Origanum vulgare L.). The structure of a new compound (5a) was determined to be 2-caffeoyloxy-3-[2-(4-hydroxybenzyl)- 4,5-dihydroxy]phenylpropionic acid on the basis of spectroscopic evidence. Especially, phenyl glucoside (1) and 5a showed an activity comparable to that of BHA.
99 citations
TL;DR: In this article, four new glucosides, isolated from grapefruit seeds, were identified as limonin 17-O -β-d -glucopyranoside, nomilin 17 O -βd d -glocopyrane, deacetylnomilin and obacunone.
95 citations
TL;DR: In this article, a new ionone derivative glucoside, icariside B8, two new lignan glycosides and four new phenylethanoid glucosides were identified from the aerial parts of Epimedium diphyllum.
88 citations
TL;DR: In this article, the structures of a triterpene, belleric acid, and its glucoside, Bellericoside have been defined as 2α,3β,23,24,tetrahydroxyolean-12-en-28-oic acid and its β-d -glucopyranosyl ester.
76 citations
TL;DR: A root culture of Panax ginseng was able to convert 3,5-dimethoxyphenol (taxicatigenin) into its glucoside, primeveroside and gentiobioside, methyl salicylate, p-hydroxy-acetophenone, and coniferyl alcohol into dihydroconiferin [3-(3-methoxy-4-O-β-d -glucopyranosylphenyl)propan-1-ol] as mentioned in this paper.
71 citations
TL;DR: 2,5-Dimethyl-4-hydroxy-3-(2 H )furanone β-glucoside has been isolated from strawberry juice and synthesized and is shown to exist as a mixture of diastereoisomers.
67 citations
TL;DR: In this paper, the aerial parts of Pluchea indica were investigated for the discovery of terpenic glycosides, including linaloyl apiosyl glucoside, 9-hydroxyl, and plucheosides A and B. The structures of new compounds were elucidated on the basis of chemical and spectral data.
66 citations
TL;DR: In this paper, five phenol glucoside gallates were isolated from Mallotus japonicus, and their structures characterized by chemical and spectroscopic means as 4-hydroxy-2methoxyphenol 1- O -β- d -(6′- O-galloyl)glucoside, 4-Hydroxy-3-methoxideyphenolate 1-O -β -d -(2′, 6′-di-O-galloyside)glocoside.
47 citations
TL;DR: The major glycosides of the non-amidated bile acids were more polar than reference bile acid glucosides and gave quasimolecular ions at m/z 592, 594, and 610 consistent with N-acetylglucosaminides of unsaturated dihydroxy and saturated di- and trihydroxy biles acids.
47 citations
TL;DR: The effect of different tissue prehandling methods on the phenolic content of willow bark, leaves, and twigs was studied and 80% acetone was found to be slightly more effective and gentle extraction solvent for all glucosides compared with methanol.
Abstract: The effect of different tissue prehandling methods on the phenolic content of willow bark, leaves, and twigs was studied The phenolics were extracted at room temperature, purified, and analyzed by high resolution capillary gas chromatography Neither oven-drying at a low temperature nor room-drying of fresh leaves and oven-drying of bark produced any qualitative changes in the glucoside composition and only a minor binding effect was seen on the amounts of each glucoside On the other hand, oven-drying of the intact long twigs and room-drying of the bark are prehandling methods to avoid Freeze-drying or immediate analysis of frozen leaves lowered the total amount of glucosides and caused considerable qualitative changes to the glucoside composition 80% acetone was found to be slightly more effective and gentle extraction solvent for all glucosides compared with methanol
43 citations
TL;DR: Two naturally occurring and immunologically active acylphloroglucinols have been isolated from the latex of Jatropha multifida and identified as (2-methylbutyryl)phlorogucinol and 1-[(2- methylbutyr)phlooglucinyll-β- d -glucopyranoside].
TL;DR: Toxicity tests reveal that, in most instances, the glucosides were less toxic than their corresponding aglycones to the fall armyworm, indicating that β-glucosidase is an activation enzyme.
TL;DR: In this article, the structure of Hypochoeris radicata has been elucidated by spectroscopic methods and chemical evidence, in addition to seven known sesquiterpenes, a new germacrane-type, eight new guaiane-type and three new eudesmane-type sesQUiterpene glucosides and a new phenylbutanoid glucoside.
TL;DR: From root bark of Xeromphis obovata, three coumarins have been isolated: scopoletin, its 7-β-d -glucopyranoside (scopolin), and the new β- d -apiosyl-(1.6′)-β- d −glocopyrano-naphoside (xeroboside) as mentioned in this paper, and two iridoids, deacetylasperulosidic acid methyl ester and gardenoside, have been identified as the corresponding acetyl derivatives
TL;DR: In this article, the incorporation of [2H] deoxyloganin was found to be largely independent of the incubation time between one day and a week, and an improved method for the preparation of deoxygeniposide from gardenoside was reported.
TL;DR: A novel furanoid diterpene glucoside with the molecular formula C 26 H 34 O 11 was isolated from the stems of Tinospora cordifolia.
TL;DR: The root culture of Panax ginseng is able to convert aromatic carboxylic acids into glucose and/or sophorose substituted conjugates as mentioned in this paper, but the conversion ratio and binding sugars depend on the properties of the administered substrate, in particular, its polarity and toxicity.
TL;DR: A new iridoid glycoside along with the known compounds, nyctanthic acid, oleanolic acid, friedelin, β-sitosterol glucoside, 6β-hydroxyloganin and arbortristoside A have been isolated from Nyctanthes arborristis and characterized by spectral and chemical means as mentioned in this paper.
TL;DR: 13 C NMR analysis of p -hydroxybenzoic acid β- O -glucoside showed that incorporation of shikimate proceeds with complete loss of the carboxy group, i.e. exclusively via the prephenatecinnamate pathway.
TL;DR: The main anthocyanin in the blue-purple flowers of Verbena cv ‘Amethyst’ was identified as delphinidin 3,5-di-O -(6- O -acetyl-β- d -glucoside) by chromatographic and spectral methods as discussed by the authors.
TL;DR: A new bitter triterpene ester glucoside has been isolated in this article along with other triterpenes, such as ulsolic acid, rotundic acid, and rotungenic acid.
Abstract: A new bitter triterpene ester glucoside have been isolated along with known bitter triterpene glucoside peduncloside and some minor triterpenes ulsolic acid, rotundic acid, and rotungenic acid from...
TL;DR: In this article, an extract obtained from neutralized apple juice, cv. Jonathan, by LC separation on Amberlite XAD resin using ethyl acetate caution, 3-hydroxyoctyl β d -glucoside was identified by HRGC, HRGC-MS and HRGC -FTIR after per- O -methylation.
TL;DR: Using TLC and HPLC, the glucoside fraction of freshly harvested vanilla beans was examined using a combination of IR, MS, 1H-NMR and 13C NMR, and the structure of glucovanillin was proven to be 4-(beta-D-glucopyranosyloxy)-3methoxybenzaldehyde as mentioned in this paper.
Abstract: Using TLC and HPLC, the glucoside fraction of freshly harvested vanilla beans was examined. In addition to confirming that glucovanillin was the most abundant glucoside present, the glucosides of p-hydroxybenzaldehyde, p-hydroxybenzoic acid and vanillic acid also were identified. Using a combination of IR, MS, 1H-NMR and 13C-NMR, the structure of glucovanillin was proven to be 4-(beta-D-glucopyranosyloxy)-3-methoxybenzaldehyde.
TL;DR: The formation of sucrose esters and linkage of the aglycone to the C-6 position of glucose are characteristic of the biotransformation of carboxylic acids by suspension cultures of C. arabica.
TL;DR: In this paper, a new secoiridoid glucoside, methyl glucooleoside (MGL), was isolated from the ripe berries of Ligustrum japonicum and its structure elucidated.
TL;DR: A new flavanone isosakuranetin 7- O -rhamnoside was isolated from Cyclotrichium niveum together with known flavanones apigenin and eriodictyol 7-O -glucoside as discussed by the authors.
TL;DR: In this paper, two new dimethoxy-acetophenone- O -glucosides and the known 2,4,6-trimethoxyacetphenone were isolated from the flowering bulbs and pseudo-stem fluid of Pancratium biflorum.