Krystyna Lesiak and Wojciech J. Stec Polish Academy of Sciences, Centre of Molecular and Macromolecular Studies, 90-362 Lodz, Boczna 5, Poland Z. Naturforsch. 33b, 782-785 (1978); received March 28, 1978 1,3,2-Oxazaphospholidines, (—)Ephedrine, Thioanilides, Thioesters, Stereochemistry Both isomers of 2-anilido-3,4-dimethyl-5-phenyl-l,3,2-oxazaphospholidine-2-thiones (2 a and 2 b) derived from ...

Objectives: The δ15N, δ13C, and δ2H profile of the ephedrine as a methamphetamine precursor is fingerprint to describing its origin. origin one supporting data in profiling. In this research, isotope profiles natural, synthetic, semi-synthetic clusters were established. These applied predict from seized samples Indonesia. Methods: clustered two steps. Initially, pseudoephedrine various prepared...

Capillary electrophoresis using β-cyclodextrin and dimethyl-β-cyclodextrin as chiral selectors was performed in parallel to gas chromatography-mass spectrometry, in an effort to characterize the enantiomeric substances in 557 illicit methamphetamine tablets in Thailand collected during 1983-2000. The study revealed the stimulants in these tablets, namely ephedrine, methamphetamine and caffeine,...

An unusual case of ventricular arrhythmia is reported with electrocardiograms showing complete attacks of ventricular tachycardia, ventricular flutter and ventricular fibrillation. The etiology is unknown. Large doses of quinidine, to the point of toxicity, seemed to halt the arrhythmia but did not prevent its recurrence. Ephedrine was given with resulting immediate improvement and no recurrenc...

Ephedrine and pseudoephedrine can be used as precursors for the illicit synthesis of stimulant drugs, such methamphetamine methcathinone. For this reason, an enantioselective capillary electrokinetic chromatography method was developed separation ephedrine enantiomers. After testing two different charged or chargeable cyclodextrins (β-cyclodextrin sulphate carboxymethyl-β-cyclodextrin) a few mi...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 871 1. Use in Sports and Legislation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 872 1.1 Caffeine . . . . . . . . . . . . . . . . . . . . . . . . . . ....

Conformations of noradrenaline, dopamine and ephedrine have been studied in aqueous solutions using high resolution PMR spectroscopy. We found that for dopamine the mole fraction of trans rotamer is increased if pH is changed from acidic to basic while for noradrenaline and ephedrine the opposite trend is observed: gauche rotamer forms of the side chain become more populated. These changes are ...