formoterol and its Impurities
Formoterol is used as a long-term treatment to prevent or decrease wheezing and trouble breathing caused by asthma or ongoing lung disease. It is also known as eformoterol.Reference standards of Formoterol API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


N-(5-((S)-2-(Benzyl((S)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
N-(5-((S)-2-(Benzyl((S)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
Catalogue No.:PA 06 45530
CAS :
143687-23-4
Molecular Formula : C33H36N2O4
Molecular Weight : 524.65


N-(5-((1S)-2-(Benzyl((1S)-2-(4-Methoxyphenyl)-1-Methylethyl)Amino)-1-Hydroxyethyl)-2-HydroxyPhenyl)Formamide
N-(5-((1S)-2-(Benzyl((1S)-2-(4-Methoxyphenyl)-1-Methylethyl)Amino)-1-Hydroxyethyl)-2-HydroxyPhenyl)Formamide
Catalogue No.:PA 06 45560
CAS :
67346-67-2
Molecular Formula : C26H30N2O4
Molecular Weight : 434.53


N-(5-((R)-2-(Benzyl((R)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-hydroxyphenyl)formamide
N-(5-((R)-2-(Benzyl((R)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-hydroxyphenyl)formamide
Catalogue No.:PA 06 45570
CAS :
1337876-26-2
Molecular Formula : C26H30N2O4
Molecular Weight : 434.53


N-[2-Hydroxy-5-[(1R)-1-hydroxy-2-[[(1R)-2-(4-methoxyphenyl)-1-methylethyl]amino]ethyl] phenyl]acetamide
N-[2-Hydroxy-5-[(1R)-1-hydroxy-2-[[(1R)-2-(4-methoxyphenyl)-1-methylethyl]amino]ethyl] phenyl]acetamide
Catalogue No.:PA 06 45620
CAS :
NA
Molecular Formula : C20H26N2O4
Molecular Weight : 358.44


N-(5-((R)-2-(Benzyl((R)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
N-(5-((R)-2-(Benzyl((R)-1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
Catalogue No.:PA 06 45640
CAS :
188690-83-7
Molecular Formula : C33H36N2O4
Molecular Weight : 524.66


α-[[[2-(4-Methoxyphenyl)-1-methylethyl](phenylmethyl)amino]methyl]-3-nitro-4-(phenylmethoxy)benzenemethanol
α-[[[2-(4-Methoxyphenyl)-1-methylethyl](phenylmethyl)amino]methyl]-3-nitro-4-(phenylmethoxy)benzenemethanol
Catalogue No.:PAI 06 013040
CAS :
43229-67-0
Molecular Formula : C32H34N2O5
Molecular Weight : 526.63


3-Amino-α-[[[2-(4-methoxyphenyl)-1-methylethyl](phenylmethyl)amino]methyl]-4-(phenylmethoxy)benzenemethanol
3-Amino-α-[[[2-(4-methoxyphenyl)-1-methylethyl](phenylmethyl)amino]methyl]-4-(phenylmethoxy)benzenemethanol
Catalogue No.:PAI 06 013050
CAS :
43229-68-1
Molecular Formula : C32H36N2O3
Molecular Weight : 496.65


(1R)-1-(4-(Benzyloxy)-3-nitrophenyl)-2-(((R)-1-(4-methoxyphenyl)propan-2-yl)(1-phenylethyl)amino)ethan-1-ol
(1R)-1-(4-(Benzyloxy)-3-nitrophenyl)-2-(((R)-1-(4-methoxyphenyl)propan-2-yl)(1-phenylethyl)amino)ethan-1-ol
Catalogue No.:PA 06 0451016
CAS :
NA
Molecular Formula : C33H36N2O5
Molecular Weight : 540.66


(1R)-1-(3-Amino-4-(benzyloxy)phenyl)-2-(((R)-1-(4-methoxyphenyl)propan-2-yl)(1-phenylethyl)amino)ethan-1-ol
(1R)-1-(3-Amino-4-(benzyloxy)phenyl)-2-(((R)-1-(4-methoxyphenyl)propan-2-yl)(1-phenylethyl)amino)ethan-1-ol
Catalogue No.:PA 06 0451017
CAS :
NA
Molecular Formula : C33H38N2O3
Molecular Weight : 510.68


N-(2-(Benzyloxy)-5-((1R)-1-hydroxy-2-(((R)-1-(4-methoxyphenyl)propan-2-yl)(1-phenylethyl)amino)ethyl)phenyl)formamide
N-(2-(Benzyloxy)-5-((1R)-1-hydroxy-2-(((R)-1-(4-methoxyphenyl)propan-2-yl)(1-phenylethyl)amino)ethyl)phenyl)formamide
Catalogue No.:PA 06 0451018
CAS :
NA
Molecular Formula : C34H38N2O4
Molecular Weight : 538.69


N-(2-Hydroxy-5-(1-hydroxy-2-((1-(4-methoxyphenyl)propan-2-yl)amino)ethyl)phenyl)-N-methylformamide
N-(2-Hydroxy-5-(1-hydroxy-2-((1-(4-methoxyphenyl)propan-2-yl)amino)ethyl)phenyl)-N-methylformamide
Catalogue No.:PA 06 0451020
CAS :
NA
Molecular Formula : C20H26N2O4
Molecular Weight : 358.44


N-(5-(2-(Benzyl(1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide fumarate
N-(5-(2-(Benzyl(1-(4-methoxyphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide fumarate
Catalogue No.:PA 06 0451027
CAS :
43229-69-2
Molecular Formula : C37H40N2O8
Molecular Weight : 640.73


N-(5-(2-(Benzyl(1-(4-methoxy-3-methylphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
N-(5-(2-(Benzyl(1-(4-methoxy-3-methylphenyl)propan-2-yl)amino)-1-hydroxyethyl)-2-(benzyloxy)phenyl)formamide
Catalogue No.:PAI 06 013078
CAS :
1616967-25-9
Molecular Formula : C34H38N2O4
Molecular Weight : 538.69