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Insights into the Silylation of Benzodiazepines Using ,-Bis(trimethylsilyl)trifluoroacetamide (BSTFA): In Search of Optimal Conditions for Forensic Analysis by GC-MS.
Molecules
December 2024
Grupo Química-Física Molecular y Modelamiento Computacional (QUIMOL), Escuela de Ciencias Químicas, Universidad Pedagógica y Tecnológica de Colombia, Sede Tunja, Avenida Central del Norte, Boyacá 150003, Colombia.
Silylation is a widely used derivatization technique for the gas chromatographic analysis of benzodiazepines, a class of psychoactive drugs commonly encountered in forensic and biological samples. This study investigated the optimal experimental conditions for the silylation of benzodiazepines using ,-bis(trimethylsilyl)trifluoroacetamide containing 1% trimethylchlorosilane (BSTFA + 1% TMCS), a widely employed silylating agent. Ten structurally different benzodiazepines, including variations within the classic 1,4-benzodiazepine core and triazolo ring derivatives, were selected to address the effect of structural diversity on silylation.
View Article and Find Full Text PDFA BEM-FMM TMS Coil Designer Using MATLAB Platform.
Brain Stimul
January 2025
Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, Worcester, MA, USA, 01609; Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA 02129; Department of Mathematics, Worcester Polytechnic Institute, Worcester, MA, USA, 01609.
Adolescent cerebellar nuclei manipulation alters reversal learning and perineuronal net intensity independently in male and female mice.
J Neurosci
January 2025
Arizona State University, Department of Psychology, Tempe, AZ, 85287 USA.
The cerebellum, identified to be active during cognitive and social behavior, has multisynaptic connections through the cerebellar nuclei (CN) and thalamus to cortical regions, yet formation and modulation of these pathways are not fully understood. Perineuronal nets (PNNs) respond to changes in local cellular activity and emerge during development. PNNs are implicated in learning and neurodevelopmental disorders, but their role in the CN during development is unknown.
View Article and Find Full Text PDFNMR Spectroscopic Reference Data of Synthetic Cannabinoids Sold on the Internet.
Magn Reson Chem
January 2025
Institute of Pharmaceutical Sciences, Department of Pharmaceutical Chemistry, University of Graz, Graz, Austria.
Besides classic illegal drugs, numerous designer drugs, also called new psychoactive substances (NPSs), are available on the global drug market. One of the biggest and fastest-growing substance classes comprises the synthetic cannabinoids. According to the European Monitoring Centre for Drugs and Drug Addiction (EMCDDA), 254 out of 950 monitored substances belong to this group of NPS, with 9 new cannabinoids registered for the first time in 2023.
View Article and Find Full Text PDFNMR-based structure elucidation and chiral separation of N-cyclohexylmethylone, a novel designer drug.
Forensic Sci Int
December 2024
Department of Pharmaceutical Chemistry, Institute of Pharmaceutical Sciences, University of Graz, Schubertstraße 1, Graz A-8010, Austria. Electronic address:
Synthetic cathinones belong to one of the biggest and most popular classes of New Psychoactive Substances. Each year, new derivatives appear on the drug market, traded under various labels like "bath salts" or "legal highs". In recent years, the emergence of new cathinone derivatives, containing a cyclohexyl residue, has been observed.
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