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Structure characterisation of urinary metabolites of the cannabimimetic JWH-018 using chemically synthesised reference material for the support of LC-MS/MS-based drug testing.
Beuck S, Möller I, Thomas A, Klose A, Schlörer N, Schänzer W, Thevis M. Beuck S, et al. Among authors: Schlorer N. Anal Bioanal Chem. 2011 Aug;401(2):493-505. doi: 10.1007/s00216-011-4931-5. Epub 2011 Apr 1. Anal Bioanal Chem. 2011. PMID: 21455647
The collision-induced dissociation (CID) patterns of the protonated compounds were studied by high-resolution/high-accuracy tandem mass spectrometry (MS( n )) applying an LTQ Orbitrap with direct infusion and electrospray ionisation of target analytes. ...Both metabolites were quantified in authentic doping control urine samples that had been suspicious of JWH-018 abuse after routine screening procedures, and a stable isotope-labelled (13)C(8)-(15)N-carboxy metabolite was synthesised for future analytical applications....
The collision-induced dissociation (CID) patterns of the protonated compounds were studied by high-resolution/high-accuracy tandem mass spec …
CYP21-catalyzed production of the long-term urinary metandienone metabolite 17beta-hydroxymethyl-17 alpha-methyl-18-norandrosta-1,4,13-trien-3-one: a contribution to the fight against doping.
Zöllner A, Parr MK, Drăgan CA, Dräs S, Schlörer N, Peters FT, Maurer HH, Schänzer W, Bureik M. Zöllner A, et al. Among authors: Schlorer N. Biol Chem. 2010 Jan;391(1):119-27. doi: 10.1515/BC.2010.002. Biol Chem. 2010. PMID: 19919183
Characterization of in vitro generated metabolites of the selective androgen receptor modulators S-22 and S-23 and in vivo comparison to post-administration canine urine specimens.
Thevis M, Gerace E, Thomas A, Beuck S, Geyer H, Schlörer N, Kearbey JD, Dalton JT, Schänzer W. Thevis M, et al. Among authors: Schlorer N. Drug Test Anal. 2010 Nov-Dec;2(11-12):589-98. doi: 10.1002/dta.211. Epub 2010 Oct 22. Drug Test Anal. 2010. PMID: 20967890
Screening for benfluorex and its major urinary metabolites in routine doping controls.
Thevis M, Sigmund G, Gougoulidis V, Beuck S, Schlörer N, Thomas A, Kwiatkowska D, Pokrywka A, Schänzer W. Thevis M, et al. Among authors: Schlorer N. Anal Bioanal Chem. 2011 Aug;401(2):543-51. doi: 10.1007/s00216-010-4455-4. Epub 2010 Nov 30. Anal Bioanal Chem. 2011. PMID: 21116611
Unusual mass spectrometric dissociation pathway of protonated isoquinoline-3-carboxamides due to multiple reversible water adduct formation in the gas phase.
Beuck S, Schwabe T, Grimme S, Schlörer N, Kamber M, Schänzer W, Thevis M. Beuck S, et al. Among authors: Schlorer N. J Am Soc Mass Spectrom. 2009 Nov;20(11):2034-48. doi: 10.1016/j.jasms.2009.07.016. Epub 2009 Aug 7. J Am Soc Mass Spectrom. 2009. PMID: 19734057
Exemplary, CID of protonated N-[(1-chloro-4-hydroxy-7-isopropoxy-isoquinolin-3-yl)carbonyl]glycine gives rise to the isoquinoline-3-carboxy-methyleneamide product ion which nominally eliminates a fragment of 11 u. ...
Exemplary, CID of protonated N-[(1-chloro-4-hydroxy-7-isopropoxy-isoquinolin-3-yl)carbonyl]glycine gives rise to the isoquinoline-3-c …
Electron ionization mass spectrometry of the ryanodine receptor-based Ca(2+)-channel stabilizer S-107 and its implementation into routine doping control.
Thevis M, Beuck S, Thomas A, Fusshöller G, Sigmund G, Schlörer N, Rodchenkov G, Schäfer M, Schänzer W. Thevis M, et al. Among authors: Schlorer N. Rapid Commun Mass Spectrom. 2009 Aug;23(15):2363-70. doi: 10.1002/rcm.4161. Rapid Commun Mass Spectrom. 2009. PMID: 19575395
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