BROVANA

Arformoterol, the (R,R)-enantiomer of formoterol, is a selective long-acting beta 2 - adrenergic receptor agonist (beta 2 -agonist) that has two-fold greater potency than racemic formoterol (which contains both the (S,S) and (R,R)-enantiomers). The (S,S)-enantiomer is about 1,000-fold less potent…