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David Sýkora

4 papers in the library · 39 citations · publishing 2015-2026

Papers

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Metabolic profile of 25E-NBOH in human liver microsomes, rat urine, and fungus Cunninghamella elegans.

Journal of Pharmaceutical and Biomedical Analysis August 1, 2026 Magdaléna Vágnerová, Petr Palivec, Monika Mrňavá et al.

N-benzylphenethylamines are a class of new psychoactive substances (NPS) that are increasingly being used as recreational drugs with a wide range of adverse effects, possibly even death. Currently, the appearance of new N-benzylphenethylamines far outweighs the studies of their metabolism. One of such compounds, 25E-NBOH, has been on the market for the last seven years but its pharmacological...

Achiral LC-MS/MS and chiral SFC-MS methods for quantification of methoxphenidine and O-desmethyl-methoxphenidine metabolite in rat serum and brain.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences June 1, 2025 Natalie Paškanová, Magdaléna Vágnerová, Bronislav Jurásek et al. 1 citation

Methoxphenidine (MXP), a dissociative anaesthetic derivative, has garnered the attention of toxicologists for their increasing abuse and associated toxicity. Despite that there is limited forensic and clinical toxicology data on MXP, especially regarding its metabolism and enantiomers. To fill this gap, we developed, validated and applied achiral liquid chromatography-tandem mass spectrometry...

Synthesis and identification of deschloroketamine metabolites in rats' urine and a quantification method for deschloroketamine and metabolites in rats' serum and brain tissue using liquid chromatography tandem mass spectrometry

Drug Testing and Analysis October 31, 2019 Kateřina Hájková, Bronislav Jurásek, Jan Čejka et al. 12 citations

Deschloroketamine (2-(methylamino)-2-phenyl-cyclohexanone) is a ketamine analog belonging to a group of dissociative anesthetics, which have been distributed within the illicit market since 2015. However, it was also being sold as 'ketamine' misleading people to believe that they were getting genuine ketamine. Dissociative anesthetics have also come to the attention of the psychiatric field due...

Salting-out-assisted liquid–liquid extraction as a suitable approach for determination of methoxetamine in large sets of tissue samples

Analytical and Bioanalytical Chemistry December 11, 2015 Kateřina Hájková, Bronislav Jurásek, David Sýkora et al. 26 citations

A new designer drug, a dissociative anesthetic, and a putative N-methyl-D-aspartate receptor antagonist, methoxetamine (MXE) noted by the EU Early Warning System has been already identified as a cause of several fatalities worldwide. The primary objective of this work was to develop a suitable sample preparation method allowing for isolation of MXE and its main metabolites in high yields from...