2D-NMR of natural products, part V Structure elucidation and complete1H- and13C-assignment of resin acid derivatives

1984 ◽  
Vol 115 (5) ◽  
pp. 597-603 ◽  
Author(s):  
Ernst Haslinger ◽  
Hermann Kalchhauser ◽  
Wolfgang Robien ◽  
Harald Steindl
Keyword(s):  
Natural Products ◽  
Structure Elucidation ◽  
Resin Acid ◽  
2D Nmr

ChemInform Abstract: Principles and Applications of Modern 2D NMR Techniques in Structure Elucidation of Complex Natural Products

ChemInform ◽  
2010 ◽  
Vol 23 (42) ◽  
pp. no-no
Author(s):  
ATTA-UR-RAHMAN ATTA-UR-RAHMAN ◽  
M. I. CHOUDHARY ◽  
A. PERVIN
Keyword(s):  
Natural Products ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Nmr Techniques

Computer-assisted structure elucidation of natural products with limited 2D NMR data: application of the StrucEluc system

2003 ◽  
Vol 41 (5) ◽  
pp. 359-372 ◽  
Author(s):  
Kirill A. Blinov ◽  
Dean Carlson ◽  
Mikhail E. Elyashberg ◽  
Gary E. Martin ◽  
Eduard R. Martirosian ◽  
...  
Keyword(s):  
Natural Products ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Computer Assisted ◽  
Nmr Data ◽  
Data Application ◽  
Computer Assisted Structure Elucidation

Application of a New Expert System for the Structure Elucidation of Natural Products from Their 1D and 2D NMR Data

2002 ◽  
Vol 65 (5) ◽  
pp. 693-703 ◽  
Author(s):  
Mikhail E. Elyashberg ◽  
Kirill A. Blinov ◽  
Antony J. Williams ◽  
Eduard R. Martirosian ◽  
Sergey G. Molodtsov
Keyword(s):  
Natural Products ◽  
Expert System ◽  
Structure Elucidation ◽  
2D Nmr ◽  
Nmr Data

scholarly journals Bacillimidazoles A−F, Imidazolium-Containing Compounds Isolated from a Marine Bacillus

Marine Drugs ◽  
2022 ◽  
Vol 20 (1) ◽  
pp. 43
Author(s):  
Jia-Xuan Yan ◽  
Qihao Wu ◽  
Eric J. N. Helfrich ◽  
Marc G. Chevrette ◽  
Doug R. Braun ◽  
...  
Keyword(s):  
Natural Products ◽  
Ion Mobility ◽  
Metabolic Pathways ◽  
Structure Elucidation ◽  
Biosynthetic Pathway ◽  
Isotopic Labeling ◽  
2D Nmr ◽  
Bacillus Sp ◽  
Trapped Ion ◽  
Trapped Ion Mobility Spectrometry

Chemical investigations of a marine sponge-associated Bacillus revealed six new imidazolium-containing compounds, bacillimidazoles A–F (1–6). Previous reports of related imidazolium-containing natural products are rare. Initially unveiled by timsTOF (trapped ion mobility spectrometry) MS data, extensive HRMS and 1D and 2D NMR analyses enabled the structural elucidation of 1–6. In addition, a plausible biosynthetic pathway to bacillimidazoles is proposed based on isotopic labeling experiments and invokes the highly reactive glycolytic adduct 2,3-butanedione. Combined, the results of structure elucidation efforts, isotopic labeling studies and bioinformatics suggest that 1–6 result from a fascinating intersection of primary and secondary metabolic pathways in Bacillus sp. WMMC1349. Antimicrobial assays revealed that, of 1–6, only compound six displayed discernible antibacterial activity, despite the close structural similarities shared by all six natural products.

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