Kaempferol Glycosides in Asplenium scolopendvium Newm

1990 ◽  
Vol 45 (3-4) ◽  
pp. 143-146 ◽  
Author(s):  
Mizuo Mizuno ◽  
Yosuke Kyotani ◽  
Munekazu Iinuma ◽  
Toshiyuki Tanaka ◽  
Hiroyuki Kojima ◽  
...  
Keyword(s):  
Spectral Data ◽  
Long Range ◽  
Flavonol Glycosides ◽  
Kaempferol Glycosides

Abstract Five kaempferol glycosides in the fronds of Asplenium scolopendrium were isolated . The structures of three novel flavonol glycosides were determined to be kaempferol 3-O -β-D -glucopyranosyl-( 1→3 )-β -D -(2 -O -caffeoyl)glucopyranoside 7 -O -α -L -rhamnopyranoside , kaempferol 3 -O -β -D -glucopyranosyl-(1→3 )-β -D -glucopyranoside 7 -O -α -L -rhamnopyranoside and kaempferol 3 -O -(2 -O -caffeoyl)-β -D -glucopyranoside 7 -O -α -L -rhamnopyranosideby means of spectral data (FAB-M S, 1H-1H, 1H -13C COSY and 1H-13C long range COSY), respectively.

scholarly journals Chemical Constituents of Phoebe poilanei and Their Cytotoxic Activity

2019 ◽  
Vol 14 (5) ◽  
pp. 1934578X1985096
Author(s):  
Nguyen Thi Viet Thanh ◽  
Tran Thi Minh ◽  
Dinh Thi Thu Hien ◽  
Ho Duc Cuong ◽  
Yohan Seo ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
High Resolution ◽  
Cytotoxic Activity ◽  
Spectral Data ◽  
Chemical Constituents ◽  
Flavonol Glycosides ◽  
Ionization Mass ◽  
Mass Spectral Data ◽  
Mass Spectral ◽  
Chemical Structures

Two new flavonol glycosides, rhamnocitrin 3- O-α-L-rhamnopyranosyl-(1→6)-[α-L-rhamnopyranosyl-(1→2)]-β-D-glucopyranoside (1) and quercetin 3- O-6- Z- p-coumaroyl-β-D-glucopyranosyl-(1→2)-α-L-rhamnopyranoside (2), along with 3 flavonol glycosides, isoquercitrin (3), rutin (4), and quercetin 3- O-α-L-rhamnopyranosyl-(1→6)-β-D-galactopyranoside (5), and two known sesquiterpenes, alismol (6) and spathulenol (7), were isolated from the leaves of Phoebe poilanei Kosterm. Their chemical structures were elucidated by analyses of their high-resolution electrospray ionization mass spectral data and nuclear magnetic resonance spectral data and comparison with those reported in the literature. Two sesquiterpenes 6 and 7 were found to exhibit moderate cytotoxic activity with IC50 values ranging from 21.6 to 29.8 µM.

scholarly journals Flavonol Glycosides from the Leaves of Allium Macrostemon

2015 ◽  
Vol 10 (8) ◽  
pp. 1934578X1501000 ◽  
Author(s):  
Risa Nakane ◽  
Tsukasa Iwashina
Keyword(s):  
Acid Hydrolysis ◽  
Uv Spectra ◽  
Flavonol Glycosides ◽  
Steroidal Saponins ◽  
Quercetin Glycosides ◽  
Kaempferol Glycosides ◽  
Allium Macrostemon ◽  
First Time

Twelve flavonoids were isolated from Allium macrostemon leaves. Five compounds were identified as kaempferol 3,7-di -O-glucoside (1), kaempferol 3,4′-di- O-glucoside (2), quercetin 3- O-glucoside (3), kaempferol 3- O-glucoside (4) and isorhamnetin 3- O-glucoside (5) by UV spectra, LC-MS, acid hydrolysis and HPLC comparisons with authentic standards. Other flavonoids were characterized as kaempferol glycosides (6–8, 10 and 11) and quercetin glycosides (9 and 12). Other compounds, such as steroidal saponins, have been already found from the bulbs of A. macrostemon. However, flavonoids were reported for the first time from the leaves.

scholarly journals Kaempferol Glycosides in the Flowers of Carnation and their Contribution to the Creamy White Flower Color

2010 ◽  
Vol 5 (12) ◽  
pp. 1934578X1000501 ◽  
Author(s):  
Tsukasa Iwashina ◽  
Masa-atsu Yamaguchi ◽  
Masayoshi Nakayama ◽  
Takashi Onozaki ◽  
Hiroyuki Yoshida ◽  
...  
Keyword(s):  
Nmr Spectra ◽  
Flower Color ◽  
White Flower ◽  
Flavonol Glycosides ◽  
White Line ◽  
Kaempferol Glycoside ◽  
Kaempferol Glycosides ◽  
C Nmr ◽  
Pure White

Three flavonol glycosides were isolated from the flowers of carnation cultivars ‘White Wink’ and ‘Honey Moon’. They were identified from their UV, MS, 1H and 13C NMR spectra as kaempferol 3 -O-neohesperidoside, kaempferol 3 -O-sophoroside and kaempferol 3- O-glucosyl-(1→2)-[rhamnosyl-(1→6)-glucoside]. Referring to previous reports, flavonols occurring in carnation flowers are characterized as kaempferol 3- O-glucosides with additional sugars binding at the 2 and/or 6-positions of the glucose. The kaempferol glycoside contents of a nearly pure white flower and some creamy white flower lines were compared. Although the major glycoside was different in each line, the total kaempferol contents of the creamy white lines were from 5.9 to 20.9 times higher than the pure white line. Thus, in carnations, kaempferol glycosides surely contribute to the creamy tone of white flowers.

scholarly journals Amentoflavone and Kaempferol Glycosides from the Aerial Parts of Cissampelos pareira

2017 ◽  
Vol 5 (1) ◽  
pp. 1-4
Author(s):  
Hari Prasad Devkota ◽  
Sena Miyazaki ◽  
Shoji Yahara
Keyword(s):  
Spectral Data ◽  
13C Nmr ◽  
Meoh Extract ◽  
1H And 13C Nmr ◽  
Child Birth ◽  
First Report ◽  
Aerial Parts ◽  
Kaempferol Glycosides

Aerial parts of Cissampelos pareira L. (Family: Menispermaceae), commonly known as “Batulpate” in Nepal, are used for the treatment of fever, indigestion and to stop bleeding after child birth. In this study, a biflavonoid, amentoflavone; and two kaempferol glycosides, kaempferol 3-O-b-D-glucopyranoside and kaempferol 3-O-b-D-glucuronopyranoside were isolated from 70% MeOH extract of the aerial parts. Structures of these compounds were elucidated on the basis of 1H- and 13C-NMR spectral data. To the best of our knowledge, it is the first report on the isolation of these compounds from a plant belonging to family Menispermaceae.Nepal Journal of Biotechnology. Dec. 2017 Vol. 5, No. 1:1-4

scholarly journals Fruits of Rosa brunonii – A Source of Antioxidant Phenolic Compounds

2017 ◽  
Vol 12 (11) ◽  
pp. 1934578X1701201
Author(s):  
Muhammad Ishaque ◽  
Yamin BiBi ◽  
Karin M. Valant–Vetschera ◽  
Johann Schinnerl ◽  
Markus Bacher
Keyword(s):  
Mass Spectrometry ◽  
Phenolic Compounds ◽  
Biological Activities ◽  
Radical Scavenging ◽  
2D Nmr ◽  
Flavonol Glycosides ◽  
Northern Pakistan ◽  
Dpph Assay ◽  
2D Nmr Spectroscopy ◽  
Kaempferol Glycosides

Phytochemical examination of matured fruits of Rosa brunonii collected in Northern Pakistan led to the isolation of three flavonol glycosides quercetin-3- O-rhamnoside (1), and the kaempferol glycosides astragalin (2) and tiliroside (3). Their structures were elucidated by 1D– and 2D–NMR spectroscopy and mass spectrometry. Radical scavenging activities of the crude extract and isolated compounds were assessed by a DPPH assay. The results show strong antioxidative activities of tiliroside (3) and lower activities of astragalin (2) and quercetin-3- O-rhamnoside (1). These data confirm previous reports and underline the biological activities of flavonol glycosides.

scholarly journals Flavonol Glycosides from Paederia scandens var. mairei

1990 ◽  
Vol 45 (11-12) ◽  
pp. 1081-1084 ◽  
Author(s):  
Nariyuki Ishikura ◽  
Zhi-qing Yang ◽  
Kunijiro Yoshitama ◽  
Kazu Kurosawa
Keyword(s):  
Methanolic Extract ◽  
Flavonol Glycosides ◽  
Nmr Studies ◽  
Quercetin Glycosides ◽  
Kaempferol Glycosides ◽  
Paederia Scandens

Abstract Four kaempferol glycosides and five quercetin glycosides have been isolated from a methanolic extract of Paederia scandens var. mairei leaves and stems, in which in addition four un­known glycosides of kaempferol and quercetin are present in a trace. Nine flavonol glycosides including a new glycoside quercetin 3-O-rutinoside-7-O-xylosylglucoside (paederinin) were identified by PC, HPLC, UV spectral and NMR studies.

Flavonol Glycosides from Distilled Petals of Rosa damascena Mill

2005 ◽  
Vol 60 (5-6) ◽  
pp. 379-384 ◽  
Author(s):  
Andreas Schieber ◽  
Kiril Mihalev ◽  
Nicolai Berardini ◽  
Plamen Mollov ◽  
Reinhold Carle
Keyword(s):  
Oil Recovery ◽  
High Performance ◽  
Dry Weight ◽  
Flavonol Glycosides ◽  
Rosa Damascena ◽  
Ionization Mass ◽  
Food Ingredients ◽  
Predominant Component ◽  
Kaempferol Glycosides ◽  
Promising Source

Flavonol glycosides were extracted from petals of Rosa damascena Mill. after industrial distillation for essential oil recovery and characterized by high-performance liquid chromatography-electrospray ionization mass spectrometry. Among the 22 major compounds analyzed, only kaempferol and quercetin glycosides were detected. To the best of our knowledge, the presence of quercetin 3-O-galactoside and quercetin 3-O-xyloside has so far not been reported within the genus Rosa. In addition, based on their fragmentation patterns, several acylated quercetin and kaempferol glycosides, some of them being disaccharides, were identified for the first time. The kaempferol glycosides, along with the kaempferol aglycone, accounted for 80% of the total compounds that were quantified, with kaempferol 3-O-glucoside being the predominant component. The high flavonol content of approximately 16 g/kg on a dry weight basis revealed that distilled rose petals represent a promising source of phenolic compounds which might be used as functional food ingredients, as natural antioxidants or as color enhancers.

scholarly journals Screening the Key Region of Sunlight Regulating the Flavonoid Profiles of Young Shoots in Tea Plants (Camellia sinensis L.) Based on a Field Experiment

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7158
Author(s):  
Jing Jin ◽  
Yi-Qing Lv ◽  
Wei-Zhong He ◽  
Da Li ◽  
Ying Ye ◽  
...  
Keyword(s):  
Field Experiment ◽  
Principal Component ◽  
Flavonol Glycosides ◽  
Light Conditions ◽  
Light Regimes ◽  
Quercetin Glycosides ◽  
Kaempferol Glycosides ◽  
Tea Plants ◽  
Tea Cultivar ◽  
Practical Field

Both UV and blue light have been reported to regulate the biosynthesis of flavonoids in tea plants; however, the respective contributions of the corresponding regions of sunlight are unclear. Additionally, different tea cultivars may respond differently to altered light conditions. We investigated the responses of different cultivars (‘Longjing 43’, ‘Zhongming 192’, ‘Wanghai 1’, ‘Jingning 1’ and ‘Zhonghuang 2’) to the shade treatments (black and colored nets) regarding the biosynthesis of flavonoids. For all cultivars, flavonol glycosides showed higher sensitivity to light conditions compared with catechins. The levels of total flavonol glycosides in the young shoots of different tea cultivars decreased with the shade percentages of polyethylene nets increasing from 70% to 95%. Myricetin glycosides and quercetin glycosides were more sensitive to light conditions than kaempferol glycosides. The principal component analysis (PCA) result indicated that shade treatment greatly impacted the profiles of flavonoids in different tea samples based on the cultivar characteristics. UV is the crucial region of sunlight enhancing flavonol glycoside biosynthesis in tea shoots, which is also slight impacted by light quality according to the results of the weighted correlation network analysis (WGCNA). This study clarified the contributions of different wavelength regions of sunlight in a field experiment, providing a potential direction for slightly bitter and astringent tea cultivar breeding and instructive guidance for practical field production of premium teas based on light regimes.

scholarly journals Fulleropyrrolidines with orthogonally flexible substituents - synthesis and electrochemical properties

2021 ◽  
pp. 69-69
Author(s):  
Dragana Jovanovic ◽  
Jovana Stanojkovic ◽  
Dzeneta Halilovic ◽  
Rejhana Kolasinac ◽  
Tatjana Kop ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Comparative Analysis ◽  
Electrochemical Properties ◽  
Spectral Data ◽  
Long Range ◽  
Large Series ◽  
Azomethine Ylides ◽  
Range Effect ◽  
Representative Samples

A large series of disubstituted fulleropyrrolidines was synthesized and analyzed by the cyclic voltammetry. The three main groups of target compounds differ by a flexible N-chain, while their further diversity was achieved by the introduction of various rigid, aryl substituents at pyrrolidine carbon. Some dialkyl analogues were designed for comparison, as well. A standard [3+2]-cycloaddition of in situ generated azomethine ylides to C60 afforded a variety of disubstituted fulleropyrrolidines. Furthermore, a set of dumbbell-shaped di(fulleropyrrolidine) derivatives containing rigid fumaryl or isophthaloyl diamide platform was prepared in aim to investigate a long-range effect of the second fulleropyrrolidine moiety on electrochemical properties. All compounds were fully characterized by comparative analysis of spectral data, while examination of electrochemical properties was performed on representative samples, distinguished by main structural subunits. All compounds expressed quite similar electron-accepting ability, lower than C60, but higher in comparison to structurally similar N-methylfulleropyrrolidine.

Resonance and solvent effects on absorption spectra of 2-nitroaniline derivatives

1976 ◽  
Vol 29 (7) ◽  
pp. 1469 ◽  
Author(s):  
T Yokoyama
Keyword(s):  
Hydrogen Bond ◽  
Hydrogen Bonding ◽  
Hydrogen Bonds ◽  
Spectral Data ◽  
Absorption Spectra ◽  
Long Range ◽  
Solvent Effects ◽  
Intramolecular Hydrogen Bonding ◽  
Intramolecular Hydrogen

Spectral data for N-methyl-2-nitroaniline correlate well with those for N,N-dimethyl-2-nitroaniline in non-hydrogen-bonding, hydrogen-bond-accepting and amphiprotic alcoholic solvents. This same pattern has been reported for N-methyl-2-nitro-p-toluidine. These results indicate that these N-methyl compounds have no hydrogen bonds with any of the solvents studied and intramolecular hydrogen bonding predominates. In the N.M.R. spectra of such amines, long-range coupling between the H5 (ring) and N-H protons is not necessarily evidence for intramolecular hydrogen bonding.� +M substituents at the 4-position increase the twist of the dimethylamino and 2-nitro groups and enhance the C1 → C2 transition, an effect which follows the order of +M abilities of the 4-substituents.

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