Buscar
Mostrando ítems 31-40 de 4672
Cyclocreatine, an anticancer and neuroprotective agent. Spectroscopic, structural and theoretical study
(ELSEVIER SCIENCE BV, 2010)
The structural, spectroscopic and theoretical study of cyclocreatine (1-carboxymethyl-2-iminoimidazolidine, CyCre) has been performed prompted by the biological relevance of the molecule and its potential role as a ligand ...
Total Synthesis and Structural Elucidation of Cryptolatifolione
(Royal Society of Chemistry, 2015-06)
An enantioselective total synthesis of Cryptolatifolione and its C-8 epimer is presented in a protecting-group-free fashion. The synthesis relied on the use of a catalytic double Krische allylation, catalytic olefin ...
HPLC separation, NMR and QTOF/MS/MS structure elucidation of a prominent nitric oxide donor agent based on an isomeric composition of a nitrosyl ruthenium complex
(ELSEVIER SCIENCE BV, 2009)
A new and promising nitrosyl ruthenium complex, [Ru(NO)(bdqi-COOH)(terpy)](PF(6))(3), bdqi-COOH is 3,4-diiminebenzoic acid and terpy is 2,2`-terpyridine, has been synthesized as a NO donor agent. The procedure used for ...
Very long-range correlations (nJC,H n > 3) in HMBC spectra
(2008)
The structural elucidation of natural products and complex organic molecules relies heavily on the application of proton detected heteronuclear NMR. Among these techniques, the HMBC NMR experiment remains as the most popular ...
Trypanocidal tetrahydrofuran lignans from Peperomia blanda
(PERGAMON-ELSEVIER SCIENCE LTD, 2008)
Five tetrahydrofuran lignans and two known flavones were isolated from the aerial parts of Peperomia blanda. The structures of the isolated lignans were elucidated by interpretation of their spectroscopic data, including ...
Sensitivity Analysis of DP4+ with the Probability Distribution Terms: Development of a Universal and Customizable Method
(American Chemical Society, 2021-06)
DP4+ is a popular tool for structural elucidation using GIAO NMR calculations. The method was built with 16 statistical parameters [μ,σ,ν], which depend on the level of theory. Herein, we deeply analyzed the sensitivity ...
Acetogenins from Annonaceae family. Their potential biological applications
(Pergamon-Elsevier Science Ltd, 2020-06)
The aim of this contribution has been to continue with the knowledge about newly isolated acetogenins from Annonaceae family for the last fifteen years. This review will report classification, extraction, isolation, ...