Notes: (±)-cis-3-methyl Norfentanyl (Item No. 22617) is an analytical reference standard categorized as an opioid. It is a metabolite of (±)-cis-3-methyl fentanyl (Item Nos. 21676 / 9002747). The physiological and toxicological properties of (±)-cis-3-methyl-norfentanyl are not known. This product is intended for research and forensic applications.