Additionally, it has a methyl acetate sure to Rβ or its construction. 4F-MPH is structurally identical to methylphenidate except for only one fluorine atom bound to the four place around the phenethylamine core. I think that might be The easiest method to use it functionally. May need a bump After https://spencerxbeff.ageeksblog.com/26343459/the-4f-mar-diaries