scholarly journals Three New Iridoid Glucoside Salts from Hedyotis tenelliflora Growing in Vietnam

2013 ◽  
Vol 8 (11) ◽  
pp. 1934578X1300801
Author(s):  
Luu H. Van Long ◽  
Vo Thi Nga ◽  
Nguyen Phuc Dam ◽  
Mai Anh Hung ◽  
Tu Duc Dung ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Methyl Ester ◽  
Acid Methyl Ester ◽  
2D Nmr ◽  
Iridoid Glucoside ◽  
2D Nmr Spectroscopy ◽  
Sodium Salts ◽  
Chemical Structures ◽  
Acid Methyl ◽  
Acid Sodium Salt

Three new sodium salts of iridoid acids, deacetylasperulosidic acid sodium salt (1), teneoside D (2), and teneoside E (3) were isolated from the leaves of Hedyotis tenelliflora Blume (Rubiaceae), together with seven known iridoids, 6α-hydroxygeniposide (4), 6β-hydroxygeniposide (5), 6- O-methyldeacetylasperulosidic acid methyl ester (6), 6- O-methylscandoside methyl ester (7), 6α-methoxygeniposidic acid (8), daphylloside (9), and mollugoside methyl ester (10). Their chemical structures were elucidated by 1D and 2D NMR spectroscopy, as well as HR-ESI-MS analysis.

scholarly journals A New Lupane Triterpenoid from Peganum Harmala

2007 ◽  
Vol 2 (11) ◽  
pp. 1934578X0700201
Author(s):  
Tadigoppula Narender ◽  
Tanvir Khaliq ◽  
Ashish Arora
Keyword(s):  
Methyl Ester ◽  
Spectroscopic Data ◽  
Acid Methyl Ester ◽  
2D Nmr ◽  
Peganum Harmala ◽  
Acid Methyl

A new lupane triterpenoid, 27-hydroxylup-20(29)-en-27-O-(3,4-dimethoxycinnamoyl)-28-oic acid methyl ester (1) was isolated from the seeds of Peganum harmala. The structure was determined from extensive 1D- and 2D- NMR spectroscopic data.

Curviflorside and curviflorin, new naphthalene glycoside and flavanol from Plicosepalus curviflorus

2017 ◽  
Vol 72 (5-6) ◽  
pp. 197-201
Author(s):  
Nawal M. Al Musayeib ◽  
Sabrin R.M. Ibrahim ◽  
Musarat Amina ◽  
Gadah A. Al Hamoud ◽  
Gamal A. Mohamed
Keyword(s):  
Saudi Arabia ◽  
Nmr Spectroscopy ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Chemical Structures

Abstract The naphthalene glycosidecurviflorside [1,5-dihydroxy-8-methoxynaphthalene-2-O-β-D-xylopyranoside] (3) and the flavanol curviflorin [(+)-catechin-7-O-3″,4″-dihydroxybenzoate] (4), along with two known flavonoids: (+)-catechin (1) and quercetin (2) were isolated from the shoots of Plicosepalu scurviflorus Benth. (Loranthaceae) growing in Saudi Arabia and the chemical structures were elucidated by 2D-NMR spectroscopy.

Laciniatoside V: A New Bis-iridoid Glucoside. Isolation and Structure Elucidation by 2D NMR Spectroscopy

1989 ◽  
Vol 52 (1) ◽  
pp. 135-142 ◽  
Author(s):  
Benjamin Podányi ◽  
R. Stephen Reid ◽  
Akos Kocsis ◽  
László Szabó
Keyword(s):  
Nmr Spectroscopy ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Iridoid Glucoside ◽  
2D Nmr Spectroscopy

scholarly journals Synthesis of N-Heterocyclic Analogues of 28-O-Methyl Betulinate, and Their Antibacterial and Antifungal Properties

Molbank ◽  
10.3390/m1100 ◽  
2019 ◽  
Vol 2020 (1) ◽  
pp. M1100
Author(s):  
Elvira R. Shakurova ◽  
Lyudmila V. Parfenova
Keyword(s):  
Nmr Spectroscopy ◽  
Minimum Inhibitory Concentration ◽  
Methyl Ester ◽  
Inhibitory Concentration ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
One Pot ◽  
The One ◽  
Antibacterial And Antifungal ◽  
New Compounds

The paper presents the results on the one-pot pyridine quaternization using betulinic 28-O-methyl ester (1) and Tempo+Br3− cation followed by reduction of the resulting salt (2) to 1,2,5,6-tetrahydropyridine derivative (3). The structures of new compounds are confirmed by means of 1D and 2D-NMR spectroscopy, as well as MALDI TOF/TOF spectrometry. The derivatives 2 and 3 are active against S. aureus at the minimum inhibitory concentration (MIC) of 4 μg/mL and 16 μg/mL, correspondingly.

scholarly journals Constituents of Kenyan Gardenia Volkensii

2012 ◽  
Vol 7 (1) ◽  
pp. 1934578X1200700
Author(s):  
Esther W. Kinuthia ◽  
Moses K. Langat ◽  
Elizabeth M. Mwangi ◽  
Peter K Cheplogoi
Keyword(s):  
Methyl Ester ◽  
Oleanolic Acid ◽  
Acid Methyl Ester ◽  
2D Nmr ◽  
Acid Methyl

A new triterpenoid, 3-oxo-22α-hydroxy-olean-12-en-28-oic acid (1), oleanolic acid (2) and a known iridoid, 10-hydroxy-1-oxo-7-iriden-11-oic acid methyl ester (3) have been isolated from the dichloromethane extract of the dried seeds of Gardenia volkensii. Their structures were established by 1D and 2D NMR spectroscopic and MS methods.

scholarly journals Sesinoside, a New Iridoid Glucoside from Sesame (Sesamum indicum) Seedlings

2014 ◽  
Vol 9 (11) ◽  
pp. 1934578X1400901
Author(s):  
Ryo Takase ◽  
Tsuyoshi Hasegawa ◽  
Kosumi Yamada ◽  
Koji Hasegawa ◽  
Hideyuki Shigemori
Keyword(s):  
Methyl Ester ◽  
Acid Methyl Ester ◽  
Sesamum Indicum ◽  
Iridoid Glucoside ◽  
First Report ◽  
Spectroscopic Analyses ◽  
Acid Methyl

A new iridoid glucoside, sesinoside (1), was isolated from the seedlings of Sesamum indicum. The structure of 1 was elucidated by spectroscopic analyses and by methanolysis of 1, which produced the known compounds, phlorigidosides C (2) and (6 Z)-foliamenthic acid methyl ester (3). This is the first report of an iridoid glucoside with 3.

Chemical constituents from Penianthus camerounensis Dekker (Menispermaceae)

2019 ◽  
Vol 74 (10) ◽  
pp. 703-708 ◽  
Author(s):  
Georges Bellier Tabekoueng ◽  
Carine Mvot Akak ◽  
Moses K. Langat ◽  
Anatole Guy Blaise Azebaze ◽  
Alain François Kamdem Waffo ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chemical Analysis ◽  
Betulinic Acid ◽  
Chemical Constituents ◽  
2D Nmr ◽  
2D Nmr Spectroscopy ◽  
Phytochemical Study ◽  
Chemical Structures ◽  
First Time

AbstractThe phytochemical study of the roots, leaves and twigs of Penianthus camerounensis Dekker (Menispermaceae) has led to the isolation and the characterization of 20 compounds. A ceramide, camerounamide (1), and a furoclerodanediterpenoid, camerounin (2), have not been described previously, while the compounds xylopic acid (3), syringaresinol (4), iso-propylmethylcyclohexa-1,4-diol (5), 1-(28-hydroxyoctacosanoyl)glycerol (6), scoparone (7), friedelin (8), friedelanol (9) and betulinic acid (10) are being reported for the first time from the genus Penianthus alongside 10 known compounds (11–20). Chemical structures were determined using 1D- and 2D-NMR spectroscopy, MS and chemical analysis. Their chemotaxonomic importance is discussed.

Measuring the Extent of Phase Separation in Poly-3-Hexylthiophene/Phenyl-C61-Butyric Acid Methyl Ester Photovoltaic Blends with1H Spin Diffusion NMR Spectroscopy

2010 ◽  
Vol 22 (9) ◽  
pp. 2930-2936 ◽  
Author(s):  
Ryan C. Nieuwendaal ◽  
Chad R. Snyder ◽  
R. Joseph Kline ◽  
Eric K. Lin ◽  
David L. VanderHart ◽  
...  
Keyword(s):  
Phase Separation ◽  
Nmr Spectroscopy ◽  
Methyl Ester ◽  
Butyric Acid ◽  
Spin Diffusion ◽  
Acid Methyl Ester ◽  
Diffusion Nmr ◽  
Acid Methyl ◽  
Butyric Acid Methyl Ester

scholarly journals Iridoid Glucosides from Veronica pectinata var. glandulosa

2003 ◽  
Vol 58 (7-8) ◽  
pp. 481-484 ◽  
Author(s):  
U. Sebnem Harput ◽  
Akito Nagatsu ◽  
Yukio Ogihara ◽  
Iclal Saracoglu
Keyword(s):  
Nmr Spectroscopy ◽  
2D Nmr ◽  
Iridoid Glucoside ◽  
2D Nmr Spectroscopy ◽  
Iridoid Glucosides

Abstract A new highly oxygenated iridoid glucoside, urphoside B (1) was isolated from the Veronica pectinata var. glandulosa together with seven known iridoid glucosides, aucubin, catalpol, veronicoside, catalposide, verproside, amphicoside and 6-O-veratroyl catalpol. The planar as well as the stereo structures of the isolated compounds were determined by means of extensive 1D- and 2D-NMR spectroscopy and confirmed by HR-Mass.

Sign in / Sign up

Export Citation Format

Share Document