Buy Butyrfentanyl Online
Butyrfentanyl (hydrochloride) binds the μ-
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- This product has been manufactured and tested to meet ISO17025:2005 and Guide 34:2009 guidelines
- This product is intended to be used as an analytical reference standard
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- Butyr fentanyl
- NIH 10486
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Increasing numbers of new psychoactive substances (NPS) among them fentanyl derivatives has been reported by the European monitoring centre for drugs and drug addiction (EMCDDA). Butyrfentanyl is a new fentanyl derivative whose potency ratio was found to be seven compared to morphine and 0.13 compared to fentanyl. Several case reports on butyrfentanyl intoxications have been described. Little is known about its pharmacokinetic properties including its metabolism. However, knowledge of metabolism is essential for analytical detection in clinical and forensic toxicology. Therefore, in vitro and in vivo phase I and phase II metabolites of butyrfentanyl were elucidated combining liquid chromatography with a qTOF high resolution mass spectrometer. Human liver microsomes and recombinant cytochrome P450 enzymes (CYP) were used for in vitro assays. Authentic blood and urine samples from a fatal intoxication case were available for in vivo comparison. Butyrfentanyl was shown to undergo extensive metabolism. Six pathways could be postulated with hydroxylation and N-dealkylation being the major ones in vitro. In vivo, hydroxylation of the butanamide side chain followed by subsequent oxidation to the carboxylic acid represented the major metabolic step in the authentic case. Initial screening experiments with the most relevant CYPs indicated that mainly CYP2D6 and 3A4 were involved in the primary metabolic steps. Altered CYP2D6 and CYP3A4 status might cause a different metabolite pattern, making the inclusion of metabolites of different pathways recommendable when applying targeted screening procedures in clinical and forensic toxicology. Copyright © 2016 John Wiley & Sons, Ltd.