Butylone contains a methyl substitution at RN, a substitution which is shared with MDEA, ethylone, four-MEC, and certain other stimulants and entactogens. In addition, butylone is made up of substitutions at R3 and R4 on the phenyl ring with oxygen groups. These oxygen teams are incorporated into a methylenedioxy ring https://citychemiststore.com/product/buy-fentanyl-pills-online/