Structure elucidation of blood group B-like and I-active ceramide eicosa- and pentacosa-saccharides from rabbit erythrocyte membranes by combined gas chromatography-mass spectrometry; electron-impact and fast-atom-bombardment mass spectrometry; and two-dimensional correlated, relayed-coherence transfer, and nuclear overhauser effect 500-MHz 1H-N.m.r. spectroscopy

1988 ◽  
Vol 178 (1) ◽  
pp. 1-21 ◽  
Author(s):  
Peter Hanfland ◽  
Maria Kordowicz ◽  
Jasna Peter-Katalinić ◽  
Heinz Egge ◽  
Janusz Dabrowski ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Structure Elucidation ◽  
Fast Atom Bombardment ◽  
Nuclear Overhauser Effect ◽  
Erythrocyte Membranes ◽  
Gas Chromatography Mass Spectrometry ◽  
Coherence Transfer ◽  
Overhauser Effect ◽  
Nuclear Overhauser ◽  
Group B

Diterpene chemistry. III. Transformations of Labda-8(17), 14-Dien-13-ol (Manool)

1973 ◽  
Vol 26 (8) ◽  
pp. 1815 ◽  
Author(s):  
PK Grant ◽  
HTL Liau ◽  
MJ Nicholls
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Overhauser Effect ◽  
Spectroscopic Properties ◽  
Overhauser Effect ◽  
Nuclear Overhauser

The synthesis of an acetal type perfume from manool is reported. Nuclear Overhauser effect and mass spectrometry studies on a series of related acetals showed some unusual spectroscopic properties.

1H NMR studies of [N-MeAib1, Tyr(Me)4]ANGII and [N-MeAib1, Tyr(Me)4, Ile8]ANGII in dimethylsulfoxide by nuclear Overhauser effect (NOE) enhancement spectroscopy: cis-trans Isomerism of the His-Pro bond

1990 ◽  
Vol 55 (4) ◽  
pp. 1106-1111 ◽  
Author(s):  
John Matsoukas ◽  
Paul Cordopatis ◽  
Raghav Yamdagni ◽  
Graham J. Moore
Keyword(s):  
1H Nmr ◽  
Nuclear Overhauser Effect ◽  
Nmr Studies ◽  
Restricted Rotation ◽  
Overhauser Effect ◽  
Major Isomer ◽  
Conformational Properties ◽  
Nuclear Overhauser

The conformational properties of the Sarmesin analogues [N-MeAib1, Tyr(Me)4]ANGII and [N-MeAib1, Tyr(Me)4, Ile8]ANGII in hexadeutero-dimethysulfoxide were investigated by Nuclear Overhauser Effect (NOE) Enhancement Studies. Cis-trans isomers (ratio 1 : 6) due to restricted rotation of the His-Pro bond were observed. Interresidue interactions between the His Cα proton and the two Pro Cδ protons revealed that the major isomer was the trans.

scholarly journals Cylindromicin from Arctic-Derived Fungus Tolypocladium sp. SCSIO 40433

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 1080
Author(s):  
Imran Khan ◽  
Jing Peng ◽  
Zhuangjie Fang ◽  
Wei Liu ◽  
Wenjun Zhang ◽  
...  
Keyword(s):  
Secondary Metabolites ◽  
Nuclear Overhauser Effect ◽  
Inhibition Activity ◽  
Tyrosinase Inhibition ◽  
Bioactive Natural Products ◽  
Chemical Structures ◽  
Overhauser Effect ◽  
Spectroscopic Analyses ◽  
Potential Resource ◽  
Nuclear Overhauser

The fungus strain SCSIO 40433 was isolated from an Arctic-derived glacier sediment sample and characterized as Tolypocladium cylindrosporum. A new compound, cylindromicin (1), and seven known secondary metabolites (2–8) were isolated from this strain. The chemical structures of these compounds were elucidated by comprehensive spectroscopic analyses. Cylindromicin (1) featured a 3,4-dihydro-2H-pyran skeleton. The absolute configuration of compound 1 was assigned via interpretation of key Nuclear Overhauser Effect Spectroscopy (NOESY) correlations and Electronic Circular Dichroism (ECD) calculation. Cylindromicin (1) exhibited significant tyrosinase inhibition activity. This study highlights Polar fungi as a potential resource for new bioactive natural products.

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