MN-18 is a synthetic cannabinoid modeled after AKB48 (APINACA, ), with the adamantyl group replaced by a naphthalenyl group. 5-fluoro MN-18 differs structurally from MN-18 by having fluorine at the terminal carbon of the pentyl chain. The physiological and toxicological properties of this compound are unknown. This product is intended for forensic and research applications.