<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Peter Blanckaert</style></author><author><style face="normal" font="default" size="100%">Margot Balcaen</style></author><author><style face="normal" font="default" size="100%">Celine Vanhee</style></author><author><style face="normal" font="default" size="100%">Martijn Risseeuw</style></author><author><style face="normal" font="default" size="100%">Michael Canfyn</style></author><author><style face="normal" font="default" size="100%">Bart Desmedt</style></author><author><style face="normal" font="default" size="100%">Van Calenbergh, Serge</style></author><author><style face="normal" font="default" size="100%">Eric Deconinck</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Analytical characterization of &quot;etonitazepyne,&quot; a new pyrrolidinyl-containing 2-benzylbenzimidazole opioid sold online.</style></title><secondary-title><style face="normal" font="default" size="100%">Drug Test Anal</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Benzimidazoles</style></keyword><keyword><style  face="normal" font="default" size="100%">etonitazene</style></keyword><keyword><style  face="normal" font="default" size="100%">new psychoactive substances</style></keyword><keyword><style  face="normal" font="default" size="100%">opioid NPS</style></keyword><keyword><style  face="normal" font="default" size="100%">pyrrolidine analogue</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2021</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2021 Sep</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">1636</style></number><volume><style face="normal" font="default" size="100%">13</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This paper reports on the identification and full chemical characterization of the substance colloquially called &quot;etonitazepyne&quot; or &quot;N-pyrrolidino etonitazene&quot; (2-(4-ethoxybenzyl)-5-nitro-1-(2-(pyrrolidin-1-yl)ethyl)-1H-benzo[d]imidazole), a potent NPS opioid of the 5-nitrobenzimidazole class. Identification of etonitazepyne was performed, on a sample purchased during routine monitoring of the drug market, using GC-MS, HRAM LC-MS/MS, H NMR, and FTIR. The chromatographic data, together with the FTIR data, indicated the presence of a highly pure compound and already indicated a benzimidazole structure. The specific benzimidazole regio-isomer was confirmed using H NMR spectroscopy, resulting in the unambiguous identification of etonitazepyne.&lt;/p&gt;
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