Notes: AB-CHMINACA metabolite M4-d4 (Item No. 18086) is an analytical reference material that is structurally categorized as a synthetic cannabinoid. It is intended for use as an internal standard for the quantification of AB-CHMINACA metabolite M4 (Item No. 16393) by GC- or LC-MS. AB-CHMINACA metabolite M4 is an expected metabolite of AB-CHMINACA (Item No. 15434) in which the carboxamide-linked aminocarbonyl-2-methylpropyl side chain associated with both AB-CHMINACA and AB-FUBINACA has been replaced with a carboxyl group. This product is intended for research and forensic applications.