140.1432 in α-PHP) also suggested that the hydroxylation occurred possibly at the pyrrolidinyl ring or maybe the alkyl chain with the molecule. The precise posture with the hydroxylation couldn't be decided. 4F-MPH has a particularly limited history of recreational use. It was initially created as being a substitution for ethylphenidate https://garrettgpwdn.amoblog.com/the-basic-principles-of-4f-php-52142366