140.1432 in α-PHP) also suggested which the hydroxylation transpired both at the pyrrolidinyl ring or even the alkyl chain on the molecule. The exact place with the hydroxylation could not be established. 4F-MPH has a very brief background of recreational use. It was originally made as being a replacement for https://4f-php23344.bloggerswise.com/36989357/4f-php-options