Abstract
In vitro metabolism of a new synthetic cannabinoid, EAM-2201, has been investigated with human liver microsomes and major cDNA-expressed cytochrome P450 (CYP) isozymes using liquid chromatography–high resolution mass spectrometry (LC–HRMS). Incubation of EAM-2201 with human liver microsomes in the presence of NADPH resulted in the formation of 37 metabolites, including nine hydroxy-EAM-2201 (M1-M9), five dihydroxy-EAM-2201 (M10-M14), dihydrodiol-EAM-2201 (M15), oxidative defluorinated EAM-2201 (M16), two hydroxy-M16 (M17 and M18), three dihydroxy-M16 (M19-M21), N-dealkyl-EAM-2201 (M22), two hydroxy-M22 (M23 and M24), dihydroxy-M22 (M25), EAM-2201 N-pentanoic acid (M26), hydroxy-M26 (M27), dehydro-EAM-2201 (M28), hydroxy-M28 (M29), seven dihydroxy-M28 (M30-M36), and oxidative defluorinated hydroxy-M28 (M37). Multiple CYPs, including CYP1A2, 2B6, 2C8, 2C9, 2C19, 2D6, 2J2, 3A4, and 3A5, were involved in the metabolism of EAM-2201. In conclusion, EAM-2201 is extensively metabolized by CYPs and its metabolites can be used as an indicator of EAM-2201 abuse.
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