2-Phenylmorpholine
2-Phenylmorpholine is the parent compound of the substituted phenylmorpholine class of compounds. Examples of 2-phenylmorpholine derivatives include phenmetrazine, phendimetrazine, and pseudophenmetrazine, which are monoamine releasing agents and psychostimulants. 2-Phenylmorpholine itself is a potent norepinephrine–dopamine releasing agent and hence may act as a stimulant similarly.