Notes: MDMB-3en-BUTINACA butanoic acid metabolite (Item No. 28942) is an analytical reference standard that is structurally similar to known synthetic cannabinoids. MDMB-3en-BUTINACA butanoic acid metabolite is a potential metabolite of MDMB-3en-BUTINACA (Item No. 28508) based on the published metabolism of MDMB-4en-PINACA (Item No. 26097).{54127} At the time MDMB-3en-BUTINACA butanoic acid metabolite (Item No. 28942) 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.