Formoterol

N-{2-hydroxy-5-[(1R)-1-hydroxy-2-{[(2R)-1-(4-methoxyphenyl)propan-2-yl]amino}ethyl]phenyl}formamide

(2R,3R)-2,3-dihydroxybutanedioic acid; N-{2-hydroxy-5-[(1R)-1-hydroxy-2-{[(2R)-1-(4-methoxyphenyl)propan-2-yl]amino}ethyl]phenyl}formamide