scholarly journals Steroidal Glycosides from Veronica chamaedrys L. Part I. The Structures of Chamaedrosides C, C1, C2, E, E1 and E2

2012 ◽  
Vol 7 (5) ◽  
pp. 1934578X1200700 ◽  
Author(s):  
Alexandra Marchenko ◽  
Pavel Kintya ◽  
Bozena Wyrzykiewicz ◽  
Elena Gorincioi
Keyword(s):  
2D Nmr ◽  
Spectroscopic Methods ◽  
Steroidal Glycosides ◽  
Ms Analysis ◽  
The Given ◽  
First Time ◽  
Chemical Evidence

Two new spirostane glycosides, chamaedrosides C (1) and C1 (2), two new furostane glycosides, chamaedrosides E (4) and E1 (5), and two new furospirostane glycosides, chamaedrosides C2 (3) and E2 (6), have been isolated from Veronica chamaedrys L. plants. Their structures were determined on the basis of chemical evidence and extensive spectroscopic methods, including 1D- and 2D-NMR experiments, as well as MS analysis. The given compounds have been found for the first time.

scholarly journals Three Spirostanol Glycosides from the Seeds of Hyoscyamus Niger L.

2006 ◽  
Vol 1 (1) ◽  
pp. 100-103
Author(s):  
Irina Lunga ◽  
Pavel Kintia ◽  
Stepan Shvets ◽  
Carla Bassarelo ◽  
Cosimo Pizza ◽  
...  
Keyword(s):  
Spectroscopic Methods ◽  
Two Dimensional ◽  
Hyoscyamus Niger ◽  
One Dimensional ◽  
Steroidal Glycosides ◽  
Ms Analysis ◽  
The Given ◽  
First Time ◽  
Chemical Evidence

Three steroidal glycosides of spirostane series have been isolated from the seeds of Hyoscyamus niger L.(Solanaceae). Their structures were determined on the basis of chemical evidence and extensive spectroscopic methods including one-dimensional, two-dimensional NMR and MS analysis. In the genus Hyoscyamus the given compounds have been found out for the first time.

scholarly journals Phenolic Constituents of Knautia arvensis Aerial Parts

2011 ◽  
Vol 6 (11) ◽  
pp. 1934578X1100601 ◽  
Author(s):  
Jaroslaw Moldoch ◽  
Barbara Szajwaj ◽  
Milena Masullo ◽  
Lukasz Pecio ◽  
Wieslaw Oleszek ◽  
...  
Keyword(s):  
Chlorogenic Acid ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Flavone Glycoside ◽  
Aerial Parts ◽  
Dicaffeoylquinic Acid ◽  
Phenolic Constituents ◽  
First Time

A new C-6 flavone glycoside (6), together with seven known compounds, cryptochlorogenic acid (1), chlorogenic acid (2), 2- O- trans-caffeoylhydrocitric acid (3), isovitexin 7-β-D-glucopyranoside (4), 7,4′-dihydroxy-5-methoxyflavone-6- C-β-D-glucopyranoside (5), 3,5- O-dicaffeoylquinic acid (7) and 4,5- O-dicaffeoylquinic acid (8), were isolated from the aerial parts of Knautia arvensis. Their structures were elucidated by extensive spectroscopic methods including 1D- (1H, 13C and TOCSY) and 2D-NMR (DQF-COSY, HSQC, HMBC) experiments, as well as ESIMS analysis. Compounds 1, 3-5 and 8 are reported for the first time in Knautia arvensis.

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 CONTRIBUTE TO STUDY ON CHEMICAL CONSTITUENTS OF URENA LOBATA (L.) OF VIETNAM

2019 ◽  
Vol 57 (2) ◽  
pp. 162
Author(s):  
Quan Minh Pham ◽  
Hoai Van Thi Tran ◽  
Lam Tien Do ◽  
Phuong Lan Doan ◽  
Inh Thi Cam ◽  
...  
Keyword(s):  
Mental Disorders ◽  
Ethyl Acetate ◽  
Ethyl Acetate Extract ◽  
Chemical Constituents ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Tree Roots ◽  
Chemical Structures ◽  
Phytochemical Investigation ◽  
First Time

Urena lobata L. is used in Vietnamese traditional medicine for the treatment of several diseases. Tree roots are used to treat rheumatism, dysentery, poor digestion, flu, tonsils, malaria, asthma, goiter. Flowers are used to treat chickenpox, fever, and mental disorders. Branches, leaves or whole trees used to treat injuries bruises, rheumatism, mastitis, bites. Phytochemical investigation of the n-hexan and ethyl acetate extract of Urena lobata L. led to the isolation of β-sitosterol (1), β-sitosterol-3-O-β-D-glucopyranoside (2), a-acetylamino-phenylpropyl a-benzoylamino-phenylpropanoate (3), quercetin (4), and trans-tiliroside (5). Their chemical structures were determined by spectroscopic methods including MS, 1D, 2D NMR and comparing with those reported in previous papers. Two compounds 3, 5 were isolated for the first time from Urena lobata plant.

scholarly journals Triterpenes from Maytenus macrocarpa and Evaluation of Their Anti-HIV Activity

2006 ◽  
Vol 1 (12) ◽  
pp. 1934578X0600101 ◽  
Author(s):  
Sonia Piacente ◽  
Lourdes Campaner Dos Santos ◽  
Naheed Mahmood ◽  
Cosimo Pizza
Keyword(s):  
Active Compound ◽  
2D Nmr ◽  
Selectivity Index ◽  
Spectroscopic Methods ◽  
Pentacyclic Triterpenes ◽  
Esi Ms ◽  
Ms Analysis ◽  
Anti Hiv ◽  
Hiv 1

A set of pentacyclic triterpenes has been isolated from the bark of Maytenus macrocarpa (Celastraceae). It includes two new olean-12-ene derivatives, namely 3β, 22α-dihydroxy-olean-12-en-30-oic acid (1) and 22α-hydroxy-olean-12-en-3-oxo-30-oic acid (2), and the new urs-12-ene derivative 3-(E)-coumaroyluvaol (7), along with 10 known compounds possessing olean-12-ene, urs-12-ene, lupane and friedelane skeletons. The structures have been elucidated by extensive spectroscopic methods including 1D- and 2D-NMR experiments, as well as ESI-MS analysis. All isolated compounds were tested for anti-HIV activity in C8166 cells infected with HIV-1MN. The most active compound was 22α-hydroxy-12-en-3-oxo-29-oic acid (triterpenonic acid A, 4), with an EC50 value of 1 μg/mL and a selectivity index of 35.

scholarly journals Two New 8, 14-seco-pregnane Steroidal Aglycones from Roots of Cynanchum bungei

2016 ◽  
Vol 11 (12) ◽  
pp. 1934578X1601101
Author(s):  
Jia-Wen Zhao ◽  
Feng-Yang Chen ◽  
Li-Juan Gao ◽  
Shi-Fang Xu ◽  
Shu-Juan Hao ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Soluble Extract ◽  
2D Nmr Spectroscopy ◽  
Chemical Evidence

Two new 8, 14-seco skeleton C21 steroidal aglycones, cynanbungeigenin A ( 1 ) and cynanbungeigenin B ( 2 ), were isolated from the hydrolyzed extract of the EtOAc soluble extract of the roots of Cynanchum bungei. Their structures were determined on the basis of chemical evidence and extensive spectroscopic methods, including 1D and 2D NMR spectroscopy.

scholarly journals Spirostane-type Saponins from Dracaena fragrans « Yellow Coast »

2015 ◽  
Vol 10 (1) ◽  
pp. 1934578X1501000
Author(s):  
Abdelmalek Rezgui ◽  
Anne-Claire Mitaine-Offer ◽  
Tomofumi Miyamoto ◽  
Chiaki Tanaka ◽  
Marie-Aleth Lacaille-Dubois
Keyword(s):  
Mass Spectrometry ◽  
2D Nmr ◽  
Steroidal Glycosides ◽  
Nmr Data ◽  
First Time

Three steroidal glycosides were isolated from the bark of Dracaena fragrans (L.) Ker Gawl. « Yellow Coast », and a fourth from the roots and the leaves. Their structures were characterized on the basis of extensive 1D and 2D NMR experiments and mass spectrometry, and by comparison with NMR data of the literature. These saponins have the spirostane-type skeleton and are reported in this species for the first time.

Glycosides from Cephalaria Species

2010 ◽  
Vol 65 (11) ◽  
pp. 1384-1392 ◽  
Author(s):  
Erkan Halay ◽  
Süheyla Kırmızıgül
Keyword(s):  
Mass Spectrometry ◽  
Oleanolic Acid ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Gram Negative Bacteria ◽  
Gram Negative ◽  
Nmr Techniques ◽  
Basic Hydrolysis ◽  
Hydrolysis Of ◽  
Chemical Evidence

Three novel triterpene glycosides (1 - 3), namely lycicoside I, II and cilicicoside I, were isolated from two different Cephalaria (Dipsacaceae) species along with one known oleanane- and one iridoit- type of glycoside. The structures of these compounds were established as 3-O-[β -D-glucopyranosyl( 1→3)-α-L-rhamnopyranosyl(1→4)-β -D-xylopyranosyl(1→4)-β -D-xylopyranosyl]-28-O-[β -Dglucopyranosyl( 1→6)-β -D-glucopyranosyl]-oleanolic acid (1), 3-O-[β -D-xylopyranosyl(1→3)-α- L-rhamnopyranosyl(1→4)-β -D-xylopyranosyl]-28-O-[β -D-glucopyranosyl]-oleanolic acid (2) from Cephalaria lycica Matthew and 3-O-{β -D-glucopyranosyl(1→4)-β -D-xylopyranosyl(1→3)-α-Lrhamnopyranosyl( 1→2)-[β -D-glucopyranosyl(1→3)]-α -L-rhamnopyranosyl}-28-O-[β -D-glucopyranosyl( 1→6)-β -D-glucopyranosyl]-hederagenin (3) from Cephalaria cilicica Boiss. & Kotschy, on the basis of spectroscopic methods (1D and 2D NMR techniques, mass spectrometry) and chemical evidence. In addition, three new prosapogenins, 1B - 3B, were obtained from the basic hydrolysis of 1 - 3. The antimicrobial activity of 1 - 3 was tested against some Gram-positive and Gram-negative bacteria strains.

Chemical Constituents from Euphorbia helioscopia

2011 ◽  
Vol 396-398 ◽  
pp. 1337-1340 ◽  
Author(s):  
Di Geng ◽  
Lian Jin Weng ◽  
Yuan Yuan Han ◽  
Xin Yang
Keyword(s):  
Silica Gel ◽  
Chemical Constituents ◽  
2D Nmr ◽  
Spectroscopic Methods ◽  
Nmr Spectrum ◽  
Euphorbia Helioscopia ◽  
First Time ◽  
Spectrum Data

AIM: To study the chemical constituents of Euphorbia helioscopia. METHODS: Compounds 1-10 were isolated and purified by silica gel, Sephadex LH-20 and Rp-18 chromatogarphy. Their structures were elucidated mainly by spectroscopic methods. RESULTS: Ten known compounds, helioscopinolide A(1), helioscopinolide B(2), scopoletin(3), scoparone(4), isoscopoletin(5), licochalone A(6), quercelin(7), 7, 4’-dihydroxy-5-methoxy flacanone(8), 2’, 4’-dihydroxy-6’-methoxydihydrochalcone(9) and pinocembrin(10), were isolated and structurally elucidated. CONCLUSION: Compound 3-5 and 8-10 were isolated from this plant for the first time. 2D NMR spectrum data of 2 were also reported in this paper.

scholarly journals Four Flavan-3-ol Compounds From The Stembark of Chisocheton balansae C.DC. (MELIACEAE)

Molekul ◽  
2021 ◽  
Vol 16 (1) ◽  
pp. 9
Author(s):  
Unang Supratman ◽  
Mohamad Fajar ◽  
Supriatno Salam ◽  
Rani Maharani ◽  
Desi Harneti ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
13C Nmr ◽  
Chemical Structure ◽  
Ethyl Acetate Extract ◽  
2D Nmr ◽  
Stem Bark ◽  
Spectroscopic Methods ◽  
Endemic Plants ◽  
North Sulawesi ◽  
First Time

Chisocheton balansae C.DC., is one of the Meliaceae family plants which is the endemic plants from Soputan Mountain, North Sulawesi, Indonesia. This study was aimed to determine the chemical structure of flavan-3-ol compounds from ethyl acetate extract of C. balansae C.DC stembark. Dried powder of C. balansae C.DC stem bark was extracted consecutively with n-hexane, ethyl acetate, and methanol solvents. Four flavan-3-ol compounds, named catechin (1), epicatechin (2), epigallocatechin-3-O-gallate (3), and epicatechin-3-O-gallate (4) were successfully isolated from ethyl acetate extract. The chemical structure of these isolates was determined by spectroscopic methods (1H-NMR, 13C-NMR, DEPT, and 2D-NMR) and comparison with previous reported spectral data. These compounds are first time reported from this plant.

Sign in / Sign up

Export Citation Format

Share Document