Results 11 to 20 of about 234,776 (300)

The Evolving Landscape of NMR Structural Elucidation [PDF]

open access: yesMolecules
Nuclear Magnetic Resonance (NMR) spectroscopy has long been a cornerstone in the structural elucidation of molecules, offering unique insights into atomic-level connectivity, conformation, and dynamics.
Josep Saurí
doaj   +2 more sources

A transformer based generative chemical language AI model for structural elucidation of organic compounds [PDF]

open access: yesJournal of Cheminformatics
For over half a century, computer-aided structural elucidation systems (CASE) for organic compounds have relied on complex expert systems with explicitly programmed algorithms. These systems are often computationally inefficient for complex compounds due
Xiaofeng Tan
doaj   +2 more sources

Structural Elucidation of Hybutimibe

open access: yesChinese Journal of Magnetic Resonance
The structure of hybutimibe was analyzed by ultraviolet absorption spectroscopy, infrared absorption spectroscopy, mass spectrometry, nuclear magnetic resonance (1H NMR, 13C NMR, DEPT, 1H-1H COSY, 1H-1H NOESY, 1H-13C HSQC and 1H-13C HMBC) spectroscopy ...
XU Xiaojie   +6 more
doaj   +2 more sources

(2R,4S,5S)-5-Methoxy-4-methyl-3-oxohept-6-en-2-yl benzoate

open access: yesIUCrData, 2021
The title compound, C16H20O4, was synthesized in the course of the total synthesis of fusaequisin A in order to verify and confirm the configurations of the stereogenic centers and to exclude the possibility of epimerization during the methylation ...
Ann-Christin Schmidt   +2 more
doaj   +1 more source

How Low Can It Go? ATR-FTIR Characterization of Compounds Isolated from Ginger at the Nanogram Level

open access: yesEngineering Proceedings, 2023
This proof-of-concept study demonstrated the potential of attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy for the structural characterization of natural products when only very small quantities of the target compound are ...
Joel B. Johnson   +3 more
doaj   +1 more source

Structural elucidation of substrate-bound aminoglycoside acetyltransferase (3)-IIIa.

open access: yesPLoS ONE, 2022
Canonical aminoglycosides are a large group of antibiotics, where the part of chemical diversity stems from the substitution of the neamine ring system on positions 5 and 6.
Michał Zieliński   +3 more
doaj   +3 more sources

Pyoverdine Analysis – From High-resolution MS/MS Fragmentation to Ion Mobility Measurements

open access: yesCHIMIA, 2023
Microorganisms produce iron chelators called siderophores that are a rich source for drug discovery or plant protective agents. Pyoverdines are a class of siderophores from fluorescent Pseudomonas members and consist of different peptide chains specific
Karoline Rehm   +3 more
doaj   +1 more source

Review of Recent Advances in Lipid Analysis of Biological Samples via Ambient Ionization Mass Spectrometry

open access: yesMetabolites, 2021
The rapid and direct structural characterization of lipids proves to be critical for studying the functional roles of lipids in many biological processes.
Haiyan Lu   +3 more
doaj   +1 more source

Elucidating ‘undecipherable’ chemical structures using computer‐assisted structure elucidation approaches [PDF]

open access: yesMagnetic Resonance in Chemistry, 2012
Structure elucidation using 2D NMR data and application of traditional methods of structure elucidation are known to fail for certain problems. In this work, it is shown that computer‐assisted structure elucidation methods are capable of solving such problems.
Williams, Antony   +3 more
openaire   +2 more sources

Molecular Dynamics, Biological Study and Extractive Spectrophotometric Determination of Vanadium (V) - 2-methyl-8-quinolinol Complex [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2021
An extractive spectrophotometric method is developed for the trace determination of vanadium (V). 2-Methyl-8-quinolinol(MQ) reacts with vanadium(V) to form a 1:2 (V : MQ) light brown complex in an aqueous medium at 0.05 M CH3COOH concentration which is ...
Shiwani Singh   +4 more
doaj   +1 more source

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