JWH 018 N-pentanoic acid metabolite-d5 contains five deuterium atoms at the 2, 4, 5, 6, and 7 positions. It is intended for use as an internal standard for the quantification of JWH 018 N-pentanoic acid metabolite (Item No. 9000856) by GC- or LC-mass spectrometry (MS). JWH 018 is a mildly selective agonist of the peripheral cannabinoid (CB2) receptor, derived from the aminoalkylindole WIN 55,212-2. The Ki values for binding central cannabinoid (CB1) and CB2 receptors are 9.0 and 2.94 nM, respectively, for a CB1:CB2 ratio of 3.06.1 JWH 018 is one of several synthetic CBs which have been included in smoking mixtures. JWH 018 N-pentanoic acid metabolite is a minor urinary metabolite of JWH 018, characterized by carboxylation of the N-alkyl chain.2 In urine samples, this metabolite is almost completely glucuronidated.2WARNING This product is not for human or veterinary use.