Notes: AB-FUBINACA metabolite 4 (Item No. 20179) is an analytical reference standard that is structurally classified as a synthetic cannabinoid. It is the carboxylic acid indazole 4-fluorobenzyl metabolite of AB-FUBINACA (Item Nos. 14039 / ISO60211).{30114} The physiological and toxicological properties of this compound are not known. This product is intended for forensic and research applications.