Notes: (2R,6R)-Hydroxynorketamine (hydrochloride) (Item No. 19603) is an analytical reference standard that is categorized as an arylcyclohexylamine. It is a metabolite of ketamine (Item Nos. 19389 / 11630) and norketamine (Item Nos. 20128 / 15787).{49402} This product is intended for research and forensic applications.