scholarly journals Heteronuclear selective refocusing 2D NMR experiments for the spectral analysis of enantiomers in chiral oriented solvents

2004 ◽  
Vol 42 (7) ◽  
pp. 594-599 ◽  
Author(s):  
Jonathan Farjon ◽  
Jean-Pierre Baltaze ◽  
Philippe Lesot ◽  
Denis Merlet ◽  
Jacques Courtieu
Keyword(s):  
Spectral Analysis ◽  
2D Nmr

scholarly journals Three New Monoterpene Glucosides from Senecio solidagineus

2014 ◽  
Vol 9 (7) ◽  
pp. 1934578X1400900
Author(s):  
Dingxiang Li ◽  
Guixin Chou ◽  
Zhengtao Wang
Keyword(s):  
Spectral Analysis ◽  
2D Nmr

Three new monoterpene glucosides, solidagin A, B, and C (1–3), together with two known alkaloids, senecionine (4) and senkirkine (5), were isolated from Senecio solidagineus, and their structures were elucidated on the basis of 1D and 2D NMR spectral analysis.

scholarly journals Structure and Absolute Configuration of a Diterpenoid from Castanea mollissima

2010 ◽  
Vol 5 (1) ◽  
pp. 1934578X1000500
Author(s):  
Hui-Yuan Gao ◽  
Xiao-Bo Wang ◽  
Rong-Gang Xi ◽  
Bo-Hang Sun ◽  
Jian Huang ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Enzymatic Hydrolysis ◽  
Tumor Cells ◽  
Absolute Configuration ◽  
Inhibitory Activity ◽  
2D Nmr ◽  
Growth Inhibitory ◽  
Growth Inhibitory Activity ◽  
Castanea Mollissima ◽  
Hydrolysis Of

From the nuts of Castanea mollissima Blume, a new kauranoid diterpene glycoside, named mollioside (1), was isolated. Its structure was established as (4R, 5S, 6R, 8R, 9S, 10S, 13R, 16R) 17-O-β-D-glucopyranoside, ent-6,7-epoxy-6α-hydroxyl-6,7-secokaur-19-oic acid, 6, 19-lactone-16β, 17-diol on the basis of HR-FAB-MS, 1D, 2D-NMR and CD spectral analysis. The aglycone (1a, named mollissin), also as a new compound, was obtained after enzymatic hydrolysis of 1. Both compounds exhibited significant growth inhibitory activity on HeLa tumor cells, but no activity on A375-S2.

scholarly journals Angustinine – A New Benzopyridoquinolizine Alkaloid from Alangium lamarckii

2012 ◽  
Vol 7 (9) ◽  
pp. 1934578X1200700
Author(s):  
Mumu Chakraborty ◽  
Sibabrata Mukhopadhyay
Keyword(s):  
Spectral Analysis ◽  
2D Nmr ◽  
Stem Bark ◽  
Root Bark

A new benzopyridoquinolizine alkaloid, designated as angustinine (1), was isolated from the root bark of Alangium lamarckii Thwaites, along with the known ipecac alkaloid, emetine. Investigation of the stem bark of the same plant resulted in the isolation of another known ipecac alkaloid, cephaeline. The structure of the new alkaloid (1) was elucidated on the basis of 2D NMR spectral analysis.

scholarly journals Two New Spiro-Heterocyclic γ-Lactams from A Marine-Derived Aspergillus fumigatus Strain CUGBMF170049

Marine Drugs ◽  
2019 ◽  
Vol 17 (5) ◽  
pp. 289 ◽  
Author(s):  
Xiuli Xu ◽  
Jiahui Han ◽  
Yanan Wang ◽  
Rui Lin ◽  
Haijin Yang ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Circular Dichroism ◽  
Aspergillus Fumigatus ◽  
2D Nmr ◽  
Two Dimensional ◽  
One Dimensional ◽  
Helvolic Acid ◽  
Circular Dichroïsm

Two new spiro-heterocyclic γ-lactam derivatives, cephalimysins M (1) and N (2), were isolated from the fermentation cultures of the marine-derived fungus Aspergillus fumigatus CUGBMF17018. Two known analogues, pseurotin A (3) and FD-838 (4), as well as four previously reported helvolic acid derivatives, 16-O-propionyl-16-O-deacetylhelvolic acid (5), 6-O-propionyl-6-O-deacetylhelvolic acid (6), helvolic acid (7), and 1,2-dihydrohelvolic acid (8) were also identified. One-dimensional (1D), two-dimensional (2D) NMR, HRMS, and circular dichroism spectral analysis characterized the structures of the isolated compounds.

Acylated Iridoid Glycosides from the Flowers of Verbascum lasianthum Boiss. ex Bentham

2006 ◽  
Vol 61 (9) ◽  
pp. 1183-1187 ◽  
Author(s):  
I. Irem Tatli ◽  
Ikhlas A. Khan ◽  
Zeliha S. Akdemir
Keyword(s):  
Spectral Analysis ◽  
Iridoid Glycosides ◽  
2D Nmr ◽  
Geniposidic Acid

Abstract Two new (1 - 2) and five known iridoid glycosides (3 - 7) as well as a known saponin (8) were isolated from the flowers of Verbascum lasianthum and their structures were determined as 6-O-(4"-O-trans-p-coumaroyl)-α-L-rhamnopyranosylaucubin (1), 6-O-(4"-O-trans-p-methoxycinnamoyl)- α-L-rhamnopyranosylaucubin (2), sinuatol (3), aucubin (4), geniposidic acid (5), catalpol (6), ajugol (7) and ilwensisaponin A (8) on the basis of 1D and 2D NMR spectral analysis.

scholarly journals A New Pentacyclic Triterpene fromHumata tyermanniMoore with the Inhibitory Activities against LPS-Induced NO Production in RAW264.7 Macrophages

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Lei Zhang ◽  
Feng Wang ◽  
Zhen-You Jiang ◽  
Yao-Kui Zhu ◽  
Ying-Zhou Cen
Keyword(s):  
Nitric Oxide ◽  
Spectral Analysis ◽  
2D Nmr ◽  
No Production ◽  
Pentacyclic Triterpene ◽  
Raw264.7 Macrophages ◽  
Inhibitory Activities

One new pentacyclic triterpene, hopane-22 (29)-en-24ol(2), with five known hopane-type pentacyclic triterpene compounds: hop-22(29)-ene(1), adiantone(3), 22-hydroxyhopane(4), 6α, 22-dihydroxyhopane(5), and 17(21)-hopene(6)were isolated fromHumata tyermanniMoore. The structure of compound2was elucidated on the basis of its 1D and 2D NMR spectral analysis. All these compounds were evaluated for their inhibitory activities of LPS-induced nitric oxide (NO) production in RAW264.7 macrophages.

scholarly journals Myrsicorianol, A New Prenylated Benzoic Acid Derivative from Myrsine Coriacea

2008 ◽  
Vol 3 (3) ◽  
pp. 1934578X0800300
Author(s):  
Juan Manuel Amaro-Luis ◽  
Sonia Koteich-Khatib ◽  
Freddy Carrillo-Rodríguez ◽  
Alí Bahsas
Keyword(s):  
Spectral Analysis ◽  
Benzoic Acid ◽  
Acid Derivative ◽  
2D Nmr ◽  
Hydroxybenzoic Acid ◽  
Benzoic Acid Derivative ◽  
Methoxybenzoic Acid

A new prenylated benzoic acid derivative, named myrsicorianol (1), was isolated from the fruits of Myrsine coriacea and its structure was determined by spectral analysis, including 1D- and 2D-NMR experiments. Myrsinoic acid A and a mixture of the p-benzoquinones, embelin, rapanone and 2,5-dihydroxy-3-pentadecyl-1,4-benzoquinone (homorapanone) were also obtained from the fruits, whilst the bark afforded myrsinoic acid A, myrsinoic acid B, 3-(3′,7′-dimethyl-2′,6′-octadienyl)-4-hydroxybenzoic acid and 3-(3′,7′-dimethyl-2′,6′-octadienyl)-4-methoxybenzoic acid.

scholarly journals New Acyclic Cytotoxic Jasplakinolide Derivative from the Marine Sponge Jaspis splendens

Marine Drugs ◽  
2019 ◽  
Vol 17 (2) ◽  
pp. 100
Author(s):  
Sherif Ebada ◽  
Werner Müller ◽  
Wenhan Lin ◽  
Peter Proksch
Keyword(s):  
Spectral Analysis ◽  
Marine Sponge ◽  
Parent Compound ◽  
2D Nmr ◽  
Chemical Structures ◽  
Nmr Data ◽  
Ic50 Values ◽  
Nanomolar Range ◽  
Mouse Lymphoma

A new acylic jasplakinolide congener (2), another acyclic derivative requiring revision (4), together with two jasplakinolide derivatives including the parent compound jasplakinolide (1) were isolated from the Indonesian marine sponge Jaspis splendens. The chemical structures of the new and known compounds were unambiguously elucidated based on HRESIMS and exhaustive 1D and 2D NMR spectral analysis as well as a comparison of their NMR data with those of jasplakinolide (1). The isolated jasplakinolides inhibited the growth of mouse lymphoma (L5178Y) cells in vitro with IC50 values in the low micromolar to nanomolar range.

ChemInform Abstract: 2D-NMR: PART VI. 2D-INADEQUATE SPECTRAL ANALYSIS AND CRYSTAL STRUCTURE OF TRICYCLO(7.3.1.02,7)TRIDECANE

1984 ◽  
Vol 15 (44) ◽  
Author(s):  
G. BUCHBAUER ◽  
A. FISCHLMAYR ◽  
E. HASLINGER ◽  
W. ROBIEN ◽  
H. VOELLENKLE ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Spectral Analysis ◽  
2D Nmr

scholarly journals Parvisides A and B, New Glucosides from Galinsoga parviflora

2014 ◽  
Vol 9 (8) ◽  
pp. 1934578X1400900
Author(s):  
Nighat Afza ◽  
Abdul Malik ◽  
Shazia Yasmeen ◽  
Muhammad Irfan Ali ◽  
Sadia Ferheen ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Methanolic Extract ◽  
2D Nmr ◽  
Nmr Techniques

Phytochemical investigations of the n-butanol soluble sub-fraction of the methanolic extract of Galinsoga parviflora Cav. has led to the isolation of two new glucosides named as parvisides A (1) and B (2). Their structures have been assigned on the basis of their spectral analysis including 1D and 2D NMR techniques.

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