Formoterol Fumarate Dihydrate EP Impurity I (R,S-isomer) ((R,S)-Formoterol)

Chemical Name: N-[2-hydroxy-5-[(1R)-1-hydroxy-2-[[(1S)-2-(4-methoxyphenyl)-1-methylethyl]amino]ethyl]phenyl]formamide (as per EP); N-(2-hydroxy-5-[(1R)-1-hydroxy-2-{[(1S)-1-(4-methoxyphenyl)propan-2-yl]amino}ethyl]phenyl)formamide (as per USP)

Synonym: 2-(2-((2,6-dichlorophenyl)amino)phenyl)acetic henicosanoic anhydride