scholarly journals Pentacyclic Triterpenoids from Maytenus cuzcoina

2017 ◽  
Vol 12 (5) ◽  
pp. 1934578X1701200
Author(s):  
Carolina P. Reyes ◽  
Ignacio A. Jiménez ◽  
Isabel L. Bazzocchi
Keyword(s):  
2D Nmr ◽  
Bark Extract ◽  
Phytochemical Analysis ◽  
Spectroscopic Methods ◽  
Root Bark ◽  
Pentacyclic Triterpenoids ◽  
Isolation And Characterization ◽  
Nmr Techniques ◽  
First Time

Phytochemical analysis of the root bark extract of Maytenus cuzcoina (Celastraceae) led to the isolation and characterization of sixteen triterpenoids with a 6/6/6/6/6 pentacyclic system, including the new 22α-hydroxy-29-methoxy-3β-tetradecanoate-olean-12-ene, and 3β,24β-epoxy-29-methoxy-2α,3α,6α-trihydroxy- D:A-friedelane that is reported for the first time as a natural product. This is the first instance of the isolation of a tetradecanoate triterpene ester from a Celastraceae species. The structures were elucidated on the basis of spectrometric and spectroscopic methods, including 1D and 2D NMR techniques.

Flavon- and Flavonolglycosides from Achillea pannonica Scheele

2001 ◽  
Vol 56 (7-8) ◽  
pp. 521-525 ◽  
Author(s):  
Denata Kasaj ◽  
Liselotte Krenn ◽  
Sonja Prinz ◽  
Antje Hüfner ◽  
Shi Shan Yuc ◽  
...  
Keyword(s):  
Methanolic Extract ◽  
2D Nmr ◽  
Flavonoid Glycosides ◽  
Spectroscopic Methods ◽  
Esi Ms ◽  
Aerial Parts ◽  
Nmr Techniques ◽  
Chemotaxonomic Study ◽  
First Time ◽  
C Nmr

The detailed investigation of a methanolic extract of aerial parts of Achillea pannonica SCHEELE. within a chemotaxonomic study led to the isolation of 6 flavonoid glycosides. Besides rutin, apigenin-7-O-glucopyranoside, luteolin-7-O-glucopyranoside, apigenin-7-O-rutinoside and acacetin-7-O-rutinoside, an unusual flavondiglucoside was isolated. Its structure was established by UV, 1HNMR and 13C NMR spectroscopic methods including 2D-NMR techniques and ESI-MS as luteolin-7,4′-O-β-diglucoside. This substance is reported for the first time in the genus Achillea. Chemotaxonomic aspects are discussed briefly

scholarly journals Isolation and Characterization of Crotosparsamide, a New Cyclic Nonapeptide from Croton sparsiflorus

2010 ◽  
Vol 5 (12) ◽  
pp. 1934578X1000501 ◽  
Author(s):  
Rashad Mehmood ◽  
Abdul Malik
Keyword(s):  
Spectroscopic Data ◽  
2D Nmr ◽  
Spectral Studies ◽  
Isolation And Characterization ◽  
First Time

Crotosparsamide (1), a new cyclic nonapeptide, has been isolated from the n-butanol soluble sub-fraction of Croton sparsiflorus along with p-hydroxy methylcinnamate and kaempferol, which are reported for the first time from this species. Their structures were determined by chemical and spectral studies including ESIMS, and 1D and 2D NMR spectroscopic data.

scholarly journals Isolation and Characterization of Two New Antimicrobial Acids from Quercus incana (Bluejack Oak)

2018 ◽  
Vol 2018 ◽  
pp. 1-5
Author(s):  
Rizwana Sarwar ◽  
Umar Farooq ◽  
Sadia Naz ◽  
Nadia Riaz ◽  
Syed Majid Bukhari ◽  
...  
Keyword(s):  
Ethyl Acetate Fraction ◽  
Structural Formula ◽  
2D Nmr ◽  
Spectroscopic Technique ◽  
Pentanoic Acid ◽  
One Dimensional ◽  
Isolation And Characterization ◽  
Nmr Techniques ◽  
New Compounds

Two new compounds [1-2] were purified from ethyl acetate fraction of Quercus incana. The structure of these compounds is mainly established by using advanced spectroscopic technique such as UV, IR, one-dimensional (ID) and two-dimensional (2D) NMR techniques, and EI mass. The structural formula was deduced to be 4-hydroxydecanoic acid [1] and 4-hydroxy-3-(hydroxymethyl) pentanoic acid [2]. Both isolated compounds were tested for their antimicrobial potential and showed promising antifungal activity against Aspergillus niger and Aspergillus flavus.

Deinbollia pinnata: Isolation and Characterization of Some Phytochemicals from Aerial Parts and their Antioxidant Potential

2020 ◽  
Vol 10 ◽  
Author(s):  
Yakubu Rufai ◽  
Norazah Basar ◽  
Aliyu Sani
Keyword(s):  
Antioxidant Activity ◽  
Total Phenolic ◽  
Phytochemical Analysis ◽  
Root Bark ◽  
Ferric Ion ◽  
Scavenging Activity ◽  
Methanol Extracts ◽  
Isolation And Characterization ◽  
Ic50 Value

Background: Deinbollia pinnata belonging to Sapindaceae family are known as medicinal plants for the treatment of human diseases. Because of human over-exploitation, the choice of phytochemicals re-search and screening was basically made to add to the available compounds and ethno-medicinal records. Objective: To investigate phytochemicals and their antioxidant activities. Method: Antioxidant assays (DPPH, ABTS, FRAP) activities; phytochemical contents (Folin Ciocalteaus’s (FC) and aluminum chloride) methods; and phytochemical analysis were employed. Successful characterization of isolates using spectroscopic methods (1H NMR, 13C NMR, FTIR and GC-MS analysis). Results: Alkaloid, simple sugar, phenolics, tannins and steriods were present in all the parts. Saponin, terpenes and flavonoids were found in both leaves and root bark, while root bark and heartwood possessed quinones. The methanol extracts demonstrated total phenolic content at 75. 9 ± 2.05 GAE (mg GAE/g dw) and total flavonoid content at 88.41 ± 0.56 QUE (mg QUE/g dw). The plant extracts showed good DPPH scavenging activity with percentage inhibition more than 70% at 125 ppm. The methanol extracts showed excellent antioxidant activity towards ABTS assay with the IC50 value of 13.68 µg/mL. The extracts also exhibited the most potent ferric ion reducer at 3.45 ± 1.30 mM FRAP equivalent. Methyl gallate (2) displayed the highest antioxidant radical scavenging activity towards DPPH assay with the IC50 value of 0.19 µg/mL and pyrogallol (4) showed the highest ABTS activity with the SC50 value of 7.44 µg/mL. While, 3,4-dihydroxybenzoic acid (1) also showed the potential as ferric ion reducer ranging from 0.67± 0.01 to 3.63±0.12 mM FRAP equivalent respectively. Conclusion: Based on the antioxidant activity, methanolic extracts and its isolated constituents can be used as antioxidant sources for the management of oxidative causative diseases. Being the first report of these phytochemicals from genius Deinbollia and specie pinnata.

scholarly journals Protoflavanones from the Wood Stem of Salvertia convallariodora

2017 ◽  
Vol 12 (4) ◽  
pp. 1934578X1701200
Author(s):  
Mariana L. de Mesquita ◽  
José E. de Paula ◽  
Laila S. Espindola ◽  
Luiz A. L. Soares ◽  
Tania M. G. da Silva ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Phytochemical Analysis ◽  
Brazilian Cerrado ◽  
Stem Wood ◽  
Full Characterization ◽  
Glucosyl Ester ◽  
First Time

Phytochemical analysis of the ethyl acetate extract of stem wood of Salvertia convallariodora A. St.-Hil. (Vochysiaceae), a Brazilian Cerrado species, led to the isolation and full characterization of three new non-aromatic B-ring flavanones (1-3) as well as the terpene mixture of sericic acid (4), 24-hydroxytormentic acid (5), 24-hydroxytormentic acid glucosyl ester (6), and sericoside (7), all identified for the first time from S. convallariodora. The structures of the new flavanones (1-3) were established from IR, LC-PDA-qTOF-MS, and NMR spectral data, including 2D NMR experiments.

The Structure Elucidation and Antimicrobial Activities of Nonsterol Triterpenoids from Ixeris chinensis

2014 ◽  
Vol 69 (9-10) ◽  
pp. 1021-1025 ◽  
Author(s):  
Qing-Hu Wang ◽  
Na-Ren-Chao-Ke-Tu Han ◽  
Na-Yin-Tai Dai ◽  
Xiao-Lan Wu ◽  
Wen-Quan Tai ◽  
...  
Keyword(s):  
Petroleum Ether ◽  
Structure Elucidation ◽  
Petroleum Ether Extract ◽  
2D Nmr ◽  
Antimicrobial Activities ◽  
Spectroscopic Methods ◽  
Ether Extract ◽  
Esi Ms ◽  
Nmr Techniques ◽  
First Time

Abstract An investigation of the petroleum ether extract from Ixeris chinensis Nakai has led to the isolation of a new compound, 3-O-acetyl-22,28-cyclobauer-7-en-3β-ol (1), together with four known compounds which have been isolated from this plant for the first time, namely taraxast-20-en-3β-ol (2), 3-O-acetyl-taraxast-20-en-3β-ol (3), taraxast-20(30)-en-3β-ol (4), and 3-O-acetyl-taraxast-20(30)- en-3β-ol (5). The structures of the isolated compounds have been elucidated on the basis of spectroscopic methods including UV, IR, ESI-MS, 1D NMR, 2D NMR techniques, and by comparison with data reported in the literature. All compounds have been evaluated for their activity against various bacteria and shown to give good results

scholarly journals Isolation and characterization of polyphenols from Euphorbia heterophylla L. (Euphorbiaceae) leaves

Revista Fitos ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 49
Author(s):  
João Batista De Freitas Tostes ◽  
Antonio Jorge Ribeiro Da Silva ◽  
Ricardo Machado Kuster
Keyword(s):  
Chemical Composition ◽  
Economic Importance ◽  
Spectroscopic Methods ◽  
1H And 13C Nmr ◽  
Isolation And Characterization ◽  
Traditional Medicinal Plants ◽  
Medicinal Use ◽  
Health Disorders ◽  
First Time

Many of Euphorbiaceae species are recognized as traditional medicinal plants and the oils and latex of many species have also economic importance. In fact, Euphorbia heterophylla L., belonging to this family and popularly known in Brazil as “leiteira”, “flor-de-poetas” and wild poinsettia, has been used traditionally in Africa and India to treat many kinds of health disorders. However, the chemical composition of this species has been little studied so far. In the present investigation, the flavonoids quercitrin (quercetin 3-O-α-L-rhamnopyranoside), hyperin (quercetin 3-O-β-D-galactopyranoside), isoquercitrin (quercetin 3-O-β-D-glucopyranoside) and isoquercitrin 6”-malonate (quercetin 3-O-β-D-(6”-malonate)-glucopyranoside) were isolated from an ethyl acetate partition of aqueous ketone extract from E. heterophylla leaves. The dehydroellagitannins geraniin and phyllantusiin D as well as 1,2,3,4,6- penta-O-galloyl- β-D-glucopyranoside, caffeic acid  and the coumarin aesculetin (6,7-dihydroxycoumarin) were also isolated. All the compounds were characterized by spectroscopic methods such as 1H and 13C-NMR, COSY, HETCOR, APT and by comparison with literature data. The presence of these substances of relevant bioactivity is reported for the first time in E. heterophylla through our study supporting in this way the medicinal use of this specie.

scholarly journals A Novel Anticancer Diterpenoid from Jatropha Gossypifolia

2012 ◽  
Vol 7 (2) ◽  
pp. 1934578X1200700
Author(s):  
Abiodun Falodun ◽  
Udo Kragl ◽  
Serge-Mitherand Tengho Touem ◽  
Alexander Villinger ◽  
Thomas Fahrenwaldt ◽  
...  
Keyword(s):  
Bacterial Infections ◽  
2D Nmr ◽  
Root Bark ◽  
X Ray ◽  
Isolation And Characterization ◽  
Phytochemical Investigation ◽  
Jatropha Gossypifolia ◽  
Methylene Group

Jatropha gossypifolia root bark is used in ethnomedicine for bacterial infections and cancer of the lungs. Phytochemical investigation resulted in the isolation and characterization of a potent anticancer and novel lathyrane diterpenoid compound, abiodone, with an unusual methylene group. The structure of this novel compound was established by 1D, and 2D NMR spectroscopic experiments and confirmed by X-ray analysis.

scholarly journals Isolation and characterization of components from roots of Premna latifolia Roxb

2019 ◽  
Vol 10 (3) ◽  
pp. 2259-2264
Author(s):  
Gowtham M ◽  
Asharani I V ◽  
Paridhavi M
Keyword(s):  
Thin Layer ◽  
13C Nmr ◽  
Preparative Thin Layer Chromatography ◽  
2D Nmr ◽  
Plant Roots ◽  
Isolation And Characterization ◽  
The Individual ◽  
First Time ◽  
Layer Chromatography

The aim of the current work was to isolate and characterize structurally fascinating and biologically intriguing compounds from the dried roots of Premna latifolia. Dried plant roots were subjected to soxhalation with ethyl alcohol and later to column chromatography. The individual compounds were isolated by preparative thin-layer chromatography followed by structural characterization using various spectral ways like LCMS, IR, 1D-NMR and 2D-NMR (1H-1H NMR and 1H-13C NMR). Three totally different compounds were isolated and characterised as Compound 1: n-Tridecanyl n-Tetracosanoate, Compound 2: Stigmanstan -3β-olyln-octadec-9ʹ, 12ʹ-dienoate and Compound 3: n-Tetracosanol for the first time from Premna latifolia roots.

scholarly journals Structural Characterization of Lignin and Its Degradation Products with Spectroscopic Methods

2017 ◽  
Vol 2017 ◽  
pp. 1-15 ◽  
Author(s):  
Yao Lu ◽  
Yong-Chao Lu ◽  
Hong-Qin Hu ◽  
Feng-Jin Xie ◽  
Xian-Yong Wei ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Degradation Products ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Spectroscopic Techniques ◽  
Qualitative And Quantitative ◽  
High Efficient ◽  
Nmr Techniques ◽  
Lignin Structure

Lignin is highly branched phenolic polymer and accounts 15–30% by weight of lignocellulosic biomass (LCBM). The acceptable molecular structure of lignin is composed with three main constituents linked by different linkages. However, the structure of lignin varies significantly according to the type of LCBM, and the composition of lignin strongly depends on the degradation process. Thus, the elucidation of structural features of lignin is important for the utilization of lignin in high efficient ways. Up to date, degradation of lignin with destructive methods is the main path for the analysis of molecular structure of lignin. Spectroscopic techniques can provide qualitative and quantitative information on functional groups and linkages of constituents in lignin as well as the degradation products. In this review, recent progresses on lignin degradation were presented and compared. Various spectroscopic methods, such as ultraviolet spectroscopy, Fourier-transformed infrared spectroscopy, Raman spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy, for the characterization of structural and compositional features of lignin were summarized. Various NMR techniques, such as 1H, 13C, 19F, and 31P, as well as 2D NMR, were highlighted for the comprehensive investigation of lignin structure. Quantitative 13C NMR and various 2D NMR techniques provide both qualitative and quantitative results on the detailed lignin structure and composition produced from various processes which proved to be ideal methods in practice.

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