N-Pyrrolidino 4’-hydroxy nitazene (citrate) (Item No. 37834) is an analytical reference standard that is structurally similar to known opioids. N-Pyrrolidino 4’-hydroxy nitazene is a potential metabolite of N-pyrrolidino etonitazene (Item No. 33169) based on the published metabolism of isotonitazene (Item Nos. 30880 | 27255).1 At the time N-pyrrolidino 4’-hydroxy nitazene (citrate) (Item No. 37834) was made available for purchase, specific metabolism data had not been published. Contact us if updated information on this molecule is now available. This product is intended for research and forensic applications.WARNING This product is not for human or veterinary use.