Ball-and-stick model of terbutaline — a short-acting β2 adrenoreceptor agonist used for the prevention and reversal of bronchospasm associated with asthma, bronchitis and emphysema, It is also used off-label as a tocolytic to prevent premature birth. "Terbutaline is a racemic mixture, ("R")-(−)-enantiomer is portrayed." Created using Accelrys DS Visualizer 4.1 and Adobe Photoshop CC 2015.