Propylamphetamine

Propylamphetamine is a psychostimulant of the amphetamine family which was never marketed. It was first developed in the 1970s, mainly for research into the metabolism of, and as a comparison tool to, other amphetamines.
Propylamphetamine is inactive as a dopamine releasing agent in vitro and instead acts as a low-potency dopamine reuptake inhibitor with an of 1,013nM. The drug can be N-dealkylated to form amphetamine. A study in rats found propylamphetamine to be approximately 4-fold less potent than amphetamine.