scholarly journals LAETANINE, ICARISIDE E3, (-)-PINORESINOL AND MANTOL O-Β-D-GLUCOPYRANOSIDE, FROM AQUEOUS EXTRACT OF PHOEBE TAVOYANA (MEISSN) HOOK

2021 ◽  
Vol 59 (4) ◽  
pp. 473
Author(s):  
Thanh Nguyen ◽  
Minh Tran Thi ◽  
Linh Nguyen Thuy
Keyword(s):  
Spectral Data ◽  
Aqueous Extract ◽  
2D Nmr ◽  
First Report ◽  
Esi Ms ◽  
Chemical Structures

Four compounds including laetanine (1), icariside E3 (2), (-)-pinoresinol (3) and maltol O-β-D-glucopyranoside (4) were isolated from aqueous extract of Phoebe tavoyana (Meissn) Hook. Their chemical structures were determined based on their ESI-MS, 1D-NMR and 2D-NMR spectral data, and compared with those reported in the literature. This is the first report of compound 2 and 4 from genus Phoebe.

scholarly journals PHENYL DERIVATIVES FROM ANTIDESMA HAIANENSIS

2017 ◽  
Vol 55 (1) ◽  
pp. 8
Author(s):  
Le Canh Viet Cuong ◽  
Bui Huu Tai ◽  
Nguyen Xuan Nhiem ◽  
Pham Hai Yen ◽  
Hoang Le Tuan Anh ◽  
...  
Keyword(s):  
Methanol Extract ◽  
2D Nmr ◽  
First Report ◽  
Esi Ms ◽  
Chemical Structures ◽  
Ms Analysis ◽  
Reported Data

Five phenyl derivatives 1-O-(2′,4′ -dihydroxy-6’-methoxyphenyl)-6-O-(4′′-hydroxy-3′′,5′′-dimethoxybenzoyl)-β-D-glucopyranoside (1), 4′-O-[6′′-O-(4′′′-hydroxy-3′′′,5′′′-imethoxybenzoyl) -β-D-glucopyranosyl]-3′-hydroxyphenethyl alcohol (2), 4-hydroxymethyl-2-methoxyphenyl-6′-O-syringoyl-β-D-glucopyranoside (3), phenethyl-6-O-α-L-arabinofuranosyl-β-D-glucopyranoside (4), and 1-O-syringoyl-β-D-glucopyranoside (5) were isolated from the methanol extract of the leaves of the Vietnamese plant Antidesma hainanensis. Their chemical structures were determined using 1D, 2D-NMR and ESI-MS analysis as well as by comparison with reported data. This is the first report of these compounds from A. hainanensis.  

scholarly journals Isolation of Stigmasterol and ?-Sitosterol from the dichloromethane extract of Rubus suavissimus

2012 ◽  
Vol 1 (9) ◽  
pp. 239-242 ◽  
Author(s):  
Venkata Sai Prakash Chaturvedula ◽  
Indra Prakash
Keyword(s):  
Spectral Data ◽  
Aqueous Extract ◽  
Pharmaceutical Journal ◽  
2D Nmr

Purification of the dichloromethane (CH2Cl2) fraction of the aqueous extract of Rubus suavissimus resulted in the isolation of two sterols namely stigmasterol and ?-sitosterol. The structures of the isolated compounds were characterized on the basis of extensive spectral data (1D and 2D NMR; and MS) and in comparison with their literature data.DOI: http://dx.doi.org/10.3329/icpj.v1i9.11613 International Current Pharmaceutical Journal 2012, 1(9): 239-242 

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.

Tannins and Flavonoids from the Erodium cicutarium Herb

2005 ◽  
Vol 60 (5) ◽  
pp. 555-560 ◽  
Author(s):  
Izabela Fecka ◽  
Wojciech Cisowski
Keyword(s):  
Phenolic Acids ◽  
2D Nmr ◽  
Methyl Gallate ◽  
Esi Ms ◽  
Chemical Structures ◽  
Erodium Cicutarium ◽  
Aerial Parts ◽  
Acid Methyl

A new depside, erodiol, was isolated and identified from the aerial parts of Erodium cicutarium (Geraniaceae), together with essential compounds such as: geraniin, didehydrogeraniin, corilagin, (-) 3-O-galloylshikimic acid, methyl gallate 3-O-β -D-glucopyranoside, rutin, hyperin, quercetin 3- O-(6”-O-galloyl)-β -D-galactopyranoside, isoquercitrin and simple phenolic acids. Their chemical structures were elucidated by means of spectroscopic (ESI MS, HRESI MS, 1D and 2D NMR) evidence.

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 Melicope moluccana Antimalarial Activity of Furoquinoline Alkaloids from the Leaves of Melicope moluccana

2020 ◽  
Vol 5 (2) ◽  
pp. 138-142
Author(s):  
Ryan Ayub Wahjoedi ◽  
Ratih Dewi Saputri ◽  
Tjitjik Srie Tjahjandarie ◽  
Mulyadi Tandjung
Keyword(s):  
Plasmodium Falciparum ◽  
Spectral Data ◽  
Spectroscopic Data ◽  
Chemical Structure ◽  
Antimalarial Activity ◽  
2D Nmr ◽  
Esi Ms ◽  
Ic50 Values

Two furoquinoline alkaloids, leptanoine C (1) and haplopine-3,3´-dimethylallyl ether (2) were isolated from the leaves of Melicope moluccana. The chemical structure of both compounds was determined based on spectroscopic data, including UV, IR, HR-ESI-MS, 1D, and 2D NMR spectral data. The antimalarial activity of compounds 1-2 against Plasmodium falciparum 3D7 showing their IC50 values are 0.18 ppm and 2.28 µg/mL, respectively.

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 New Acetylated Terpenoids from Sponge Rhabdastrella providentiae Inhibit NO Production in LPS Stimulated BV2 Cells

2018 ◽  
Vol 13 (6) ◽  
pp. 1934578X1801300 ◽  
Author(s):  
Duong Thi Dung ◽  
Pham Hai Yen ◽  
Nguyen Xuan Nhiem ◽  
Tran Hong Quang ◽  
Bui Huu Tai ◽  
...  
Keyword(s):  
2D Nmr ◽  
No Production ◽  
Esi Ms ◽  
Chemical Structures ◽  
Bv2 Cells

Three new acetylated terpenoids, rhabdaprovidines A-C (1-3), were isolated from the Vietnamese sponge Rhabdastrella providentiae. Their chemical structures were established by HR-ESI-MS, 1D and 2D-NMR experiments. These compounds share 6,6,5-tricyclic nucleus of isomalabaricane-type triterpene, the specific secondary constituents from Rhabdastrella species. Compounds 1-3 inhibited NO production in LPS stimulated BV2 cells with IC50 values of 20.4 ± 1.5, 17.5 ± 0.9, and 46.8 ± 2.3 μM, respectively.

scholarly journals Guaiane Sesquiterpenoids from Jatropha curcas

2008 ◽  
Vol 3 (10) ◽  
pp. 1934578X0800301
Author(s):  
Xia-Chang Wang ◽  
Shi-Ping Ma ◽  
Jing-Han Liu ◽  
Li-Hong Hu
Keyword(s):  
Nmr Spectroscopy ◽  
Spectral Data ◽  
Jatropha Curcas ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
2D Nmr Spectroscopy ◽  
X Ray ◽  
Esi Ms ◽  
Related Compounds

Two new guaiane sesquiterpenoids named jatrophaols A and B (1, 2), along with three known analogues, were isolated from the roots of Jatropha curcas. Their structures were determined by spectroscopic methods, including 1D and 2D NMR spectroscopy, HR-EI-MS, HR-ESI-MS, and X-ray diffraction, as well as by comparison of their spectral data with those of related compounds.

scholarly journals GLYCOSIDES ISOLATED FROM THE AERIAL PARTS OF Premna integrifolia L. GROWING IN THAI BINH

2019 ◽  
Vol 57 (4) ◽  
pp. 420 ◽  
Author(s):  
Truong Thi Thu Hien ◽  
Ngo Thi Tuyet Mai ◽  
Bach Thi Tam ◽  
Nguyen Thi Thu Hien ◽  
Le Canh Viet Cuong ◽  
...  
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Previous Literature ◽  
First Report ◽  
Esi Ms ◽  
Chemical Structures ◽  
Aerial Parts

From the aerial parts of Premna integrifolia L., three glycosides acteoside (1), premnaodoroside A (2), and premnaodoroside B (3) were isolated. Their chemical structures were elucidated by means of ESI-MS, 1H-NMR, 13C-NMR, HSQC, HMBC spectra and in comparison with the previous literature. To our best knowledge, this is the first report of 1 and 3 from P. integrifolia.

Sign in / Sign up

Export Citation Format

Share Document