Chemical Name: N-[2-hydroxy-5-[(1RS)-1-hydroxy-2-[[2-(4-methoxyphenyl)ethyl]amino]ethyl]phenyl]formamide fumaric acid (as per EP); N-(2-Hydroxy-5-{1-hydroxy-2-[(4-methoxyphenethyl)amino]ethyl}phenyl)formamide Fumaric acid (as per USP)
Synonym: Desmethyl formoterol (USP)