scholarly journals DOLABRANE-TYPE DITERPENOID AND LIGNAN CONSTITUENTS FROM THE STEM BARKS OF CERIOPS DECANDRA (GRIFF.) W. THEOB.

2020 ◽  
Vol 58 (4) ◽  
pp. 419
Author(s):  
Kieu Thi Phuong Linh ◽  
Nguyen Van Chien ◽  
Nguyen Quoc Trung ◽  
Vu Huy Thong ◽  
Nguyen Van Tuyen ◽  
...  
Keyword(s):  
Detailed Analysis ◽  
Methanolic Extract ◽  
2D Nmr ◽  
Spectroscopic Techniques ◽  
Chromatographic Separations ◽  
First Report ◽  
Esi Ms ◽  
Ceriops Decandra

Three dolabrane-type diterpenoids (1‒3) and a lignan derivative (4) were isolated from a methanolic extract of C. decandra stem barks using various chromatographic separations. Their structures were elucidated to be tagalsine X (1), tagalsin P (2), ent-5α,2-oxodolabr-3-ene-3,15,16-triol (3), and (+)-pinoresinol (4) by detailed analysis via spectroscopic techniques (1D, 2D NMR, and ESI-MS data) as well as comparison with those reported. This is the first report of compound 4 from the Ceriops genus.

scholarly journals SECONDARY METABOLITES FROM THE STEM BARKS OF RHIZOPHORA MUCRONATA LAMK

2020 ◽  
Vol 58 (6) ◽  
pp. 653
Author(s):  
Nguyen Phuong Thao
Keyword(s):  
Secondary Metabolites ◽  
Detailed Analysis ◽  
Methanolic Extract ◽  
2D Nmr ◽  
Spectroscopic Techniques ◽  
Rhizophora Mucronata ◽  
Chromatographic Separations ◽  
First Report ◽  
Esi Ms ◽  
Phenolic Derivatives

Using various chromatographic separations, three phenolic derivatives (1‒3) and three phytosteryl glycosides (4‒6) were isolated from a methanolic extract of R. mucronata stem barks. Their structures were elucidated to be cinchonain Ia (1), breynioside B (2), polystachyol (3), β-sitosterol 3-O-β-D-glucopyranoside (4), β-sitosterol 3-O-β-D-(6'-O-palmitoyl) glucopyran-oside (5), and β-sitosterol 3-O-β-D-(6'-O-stearoyl)glucopyranoside (6) by detailed analysis via spectroscopic techniques (1D, 2D NMR, and ESI-MS data) as well as comparison with those reported. This is the first report of compounds 1‒6 from the Rhizophora genus.

scholarly journals PHENOLIC CONSTITUENTS FROM THE STEM BARKS OF RHIZOPHORA APICULATA BLUME

2020 ◽  
Vol 58 (5) ◽  
pp. 517
Author(s):  
Nguyen Phuong Thao
Keyword(s):  
Detailed Analysis ◽  
Methanolic Extract ◽  
2D Nmr ◽  
Spectroscopic Techniques ◽  
Chromatographic Separations ◽  
First Report ◽  
Esi Ms ◽  
Rhizophora Apiculata ◽  
Phenolic Constituents ◽  
Phenolic Derivatives

Using various chromatographic separations, seven phenolic derivatives (1‒7) were isolated from a methanolic extract of R. apiculata stem barks. Their structures were elucidated to be dunnianoside E (1), (+)-dihydroquercetin (2), 2,6-dimethoxy-[1,4]benzoquinone (3), 2,4,6-trimethoxyphenol (4), 3,4,5-trimethoxybenzyl alcohol (5), hydroxytyrosol (6), and methyl 3,4-dihydroxycinnamate (7) by detailed analysis via spectroscopic techniques (1D, 2D NMR and ESI-MS data) as well as comparison with those reported. This is the first report of compounds 1 and 4‒7 from Rhizophora genus.

scholarly journals Flavonoid Glycoside Constituents from the Leaves of Hibiscus Tiliaceus 

2021 ◽  
Vol 31 (3) ◽  
pp. 7-11
Keyword(s):  
Detailed Analysis ◽  
Methanolic Extract ◽  
Chemical Constituents ◽  
Folk Medicine ◽  
2D Nmr ◽  
Tropical Climate ◽  
Flavonoid Glycoside ◽  
Spectroscopic Techniques ◽  
Chromatographic Separations

Hibiscus tiliaceus L. is a typical plant of tropical climate and found in the regions of mangroves in Vietnam. Although all part of this plant are used in folk medicine, there are little studies of its chemical constituents. Four flavonoids (1‒4) were isolated from a methanolic extract of H. tiliaceus leaves (Malvaceae) using various chromatographic separations. Their structures were elucidated to be astragalin (1), isoquercitrin (2), rutin (3), and trans-tiliroside (4) by detailed analysis via spectroscopic techniques (1D and 2D NMR) as well as comparison with those reported.

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 Two New Compounds from Artemisia sacrorum

2016 ◽  
Vol 11 (4) ◽  
pp. 1934578X1601100
Author(s):  
Qinghu Wang ◽  
Rongjun Wu ◽  
Narenchaoketu Han ◽  
Nayintai Dai ◽  
Jiesi Wu
Keyword(s):  
Structure Elucidation ◽  
2D Nmr ◽  
Etoac Extract ◽  
First Report ◽  
Esi Ms ◽  
New Compounds

Two new compounds, named as sacric acid A (1) and sacric acid B (2), were isolated from the EtOAc extract of Artemisia sacrorum Ledeb. This is the first report on the structure elucidation of these compounds based on UV, IR, and extensive 1D and 2D NMR spectroscopic, and ESI-MS techniques.

scholarly journals Comparative Study of Naphthoquinone Contents of Selected Greek Endemic Boraginaceae Plants - Antimicrobial Activities

2017 ◽  
Vol 12 (2) ◽  
pp. 1934578X1701200
Author(s):  
Teisa Tufa ◽  
Harilaos Damianakos ◽  
Konstantia Graikou ◽  
Ioanna Chinou
Keyword(s):  
Antimicrobial Activity ◽  
Nmr Spectroscopy ◽  
Comparative Study ◽  
Pathogenic Fungi ◽  
2D Nmr ◽  
Antimicrobial Activities ◽  
2D Nmr Spectroscopy ◽  
Chromatographic Separations ◽  
Esi Ms ◽  
Related Compounds

The cyclohexane (Ch) extracts of the roots of five Greek endemic Boraginaceae plants, Onosma kaheirei Teppner, O. graeca Boiss., O. erecta Sibth. & Sm., Alkanna sfikasiana Kit Tan, Vold and Strid and Cynoglossum columnae Ten, were investigated for the presence of alkannin/shikonin-related compounds. All species, s except C. columnae and O. erecta, were found to contain this type of compounds. Seven compounds were obtained after several chromatographic separations from the Ch extracts of the investigated plants: deoxyalkannin (1), 2″-( S)- α-methylbutyrylalkannin (2), isobutyrylalkannin (3), propionylalkannin (4), acetylalkannin (5), β-hydroxyisovalerylalkannin (6), and β,β-dimethylacrylalkannin (7). All structures were identified by 1D 1H-/13C- and 2D NMR spectroscopy, assisted also by ESI-MS. The extracts and the isolated compounds exhibiting an interesting antimicrobial profile when evaluated for their antimicrobial activity against six Gram-positive and -negative bacteria and three human pathogenic fungi.

Two New Aromatic Constituents from Stocksia brahuica

1999 ◽  
Vol 54 (7) ◽  
pp. 940-942 ◽  
Author(s):  
Viqar Uddin Ahmad ◽  
Zulfiqar Ali ◽  
Muhammad Shaiq Ali ◽  
Fazila Iqbal ◽  
Muhammad Zahid ◽  
...  
Keyword(s):  
Methanolic Extract ◽  
2D Nmr ◽  
Spectroscopic Techniques ◽  
Diphenylacetic Acid

The methanolic extract of Stocksia brahuica yielded two new aromatic constituents: diphenylacetic acid and brahene (2',4'-dihydroxy-7-methoxy-4,5-methylenedioxyisoflavene). Their structures were characterized with the help of modern spectroscopic techniques including 2D-NMR.

scholarly journals First report of isolation of antibacterial ceramides from the leaves of Euclinia longiflora Salisb

2021 ◽  
Vol 16 (11) ◽  
pp. 1934578X2110486
Author(s):  
Aristide Munvera ◽  
Jean Noël Nyemb ◽  
Tamfu Alfred Ngenge ◽  
Marcelle Aude Fokam Mafo ◽  
Shelha Nuzhat ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Methanol Extract ◽  
Methanolic Extract ◽  
2D Nmr ◽  
Antibacterial Activities ◽  
Moderate Activity ◽  
Bacterial Strains ◽  
Maslinic Acid ◽  
First Report ◽  
Microdilution Method

Two phytosphingosine-type ceramides (euclinide A (1) and B (2)) were isolated alongside one fatty acid (geddic acid (3)), one fatty acid-1-glyceride ((2 S)-1- O-hentriacontanoyl glycerol (4)), ten triterpenes ( α-amyrin (5), α-amyrin acetate (6), ursolic acid (7), β-amyrin (8), β-amyrin acetate (9), β-amyrin palmitate (10), oleanic acid (11), maslinic acid (12), betulinic acid (13) and cylicodiscic acid (14)) and four sterols ( β -sitosterol (15), stigmasterol (17), and their glucosylated derivatives β-sitosterol-3-O- β-glucopyranoside (16) and stigmasterol-3-O- β-glucopyranoside (18)) from the methanol extract of the leaves of Euclinia longiflora Salisb. using routine chromatographic methods. The structures of the new ceramides and known compounds were determined by analyses of HR-FAB-MS, 1D and 2D NMR (HSQC, HMBC, and NOESY) data and confirmed, where applicable, by comparison with data reported in literature. The methanolic extract and the ceramides were evaluated for their antibacterial activities against different bacterial strains using microdilution method and the MIC values ranged from 6.25 to 50 μg/mL and were considered as moderate activity compared to ciprofloxacin. It is the first report of ceramides in Euclinia longiflora.

scholarly journals Flavonoids in Achillea collina

2001 ◽  
Vol 69 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Denata Kasaj ◽  
Liselotte Krenn ◽  
Gottfried Reznicek ◽  
Sonja Prinz ◽  
Antje Hüfner ◽  
...  
Keyword(s):  
Methanolic Extract ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Esi Ms ◽  
Aerial Parts ◽  
First Time

In a detailed study on the flavonoid pattern of Achillea collina BECKER ten flavonoids were isolated from a methanolic extract of aerial parts of the plant. Their structures were determined by UV, ESI-MS, GC-MS and NMR spectroscopic methods including 2D-NMR. Apigenin-7-O-rutinoside was proven for the first time in the genus Achillea.

scholarly journals New Antiinflammatory Cycloart-23-ene-3β-ol from Senefelderopsis Chibiriquetensis

2008 ◽  
Vol 3 (6) ◽  
pp. 1934578X0800300
Author(s):  
Dilsia J. Canelón ◽  
Alírica I. Suárez ◽  
Juan De Sanctis ◽  
Michael Mijares ◽  
Reinaldo S. Compagnone
Keyword(s):  
2D Nmr ◽  
Complete Characterization ◽  
Spectroscopic Techniques ◽  
First Report ◽  
Plant Source ◽  
Nmr Data ◽  
Anti Inflammatory

1D and 2D NMR spectroscopic techniques were used to obtain the complete characterization of cycloart-23-ene-3β-ol (1), isolated from one of the two species of Senefelderopsis belonging to the Euphorbiaceae family. This is the first report, including the NMR data, of this anti-inflammatory steroid isolated from a plant source.

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