Moreover, it has a methyl acetate sure to Rβ or its framework. 4F-MPH is structurally similar to methylphenidate excluding one fluorine atom certain to the four position on the phenethylamine Main. This merchandise is intended for laboratory analysis reasons only and are not for use for almost every other reasons. https://rechems.shop/product/buy-4f-mar-4-fluoro-4-methylaminorex/