Racefemine
Racefemine, sold under the brand names Dysmalgine and Evalgin, is a uterine spasmolytic and muscle relaxant of the amphetamine family. It is the racemic threo form of dextrofemine. The drug acts as a β-adrenergic receptor agonist and sympathomimetic. It appears to no longer be marketed. Other tocolytics with similar chemical structures as phenethylamines or amphetamines include bedoradrine, buphenine, fenoterol, hexoprenaline, isoxsuprine, ritodrine, and terbutaline.