vilanterol and its Impurities
Vilanterol is used in adults with asthma or COPD to improve symptoms and prevent bronchospasm or asthma attacks. It is a selective long-acting beta2-adrenergic agonist. Reference standards of Vilanterol API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(R)-5-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-hydroxybenzaldehyde
(R)-5-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-hydroxybenzaldehyde
Catalogue No.:PA 22 44550
CAS :
2514696-13-8
Molecular Formula : C24H31Cl2NO5
Molecular Weight : 484.41


(R)-2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethan-1-ol 2,2,2-triphenylacetate
(R)-2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethan-1-ol 2,2,2-triphenylacetate
Catalogue No.:PA 22 0441000
CAS :
2677047-63-9
Molecular Formula : C47H53Cl2NO7
Molecular Weight : 814.84


(R)-4-(2-((6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol 2,2,2-triphenylacetate
(R)-4-(2-((6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol 2,2,2-triphenylacetate
Catalogue No.:PA 22 0441001
CAS :
2518011-39-5
Molecular Formula : C44H49Cl2NO7
Molecular Weight : 774.78


(R)-4-(2-((5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
(R)-4-(2-((5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
Catalogue No.:PA 22 0441004
CAS :
503070-62-0
Molecular Formula : C23H31Cl2NO5
Molecular Weight : 472.4


(S)-4-(2-((5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
(S)-4-(2-((5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
Catalogue No.:PA 22 0441005
CAS :
NA
Molecular Formula : C23H31Cl2NO5
Molecular Weight : 472.4


4-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
4-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
Catalogue No.:PA 22 0441007
CAS :
957997-33-0
Molecular Formula : C24H33Cl2NO5
Molecular Weight : 486.43


(R)-4-(2-((6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(ethoxymethyl)phenol
(R)-4-(2-((6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(ethoxymethyl)phenol
Catalogue No.:PA 22 0441008
CAS :
1582675-85-1
Molecular Formula : C26H37Cl2NO5
Molecular Weight : 514.48


(R)-4-(1-(2,6-Dichlorophenyl)-2,5,15-trioxa-12-azaheptadecan-14-yl)-2-(ethoxymethyl)phenol
(R)-4-(1-(2,6-Dichlorophenyl)-2,5,15-trioxa-12-azaheptadecan-14-yl)-2-(ethoxymethyl)phenol
Catalogue No.:PA 22 0441010
CAS :
1582675-88-4
Molecular Formula : C28H41Cl2NO5
Molecular Weight : 542.54


(R)-6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)-N-(2-ethoxy-2-(4-ethoxy-3-(ethoxymethyl)phenyl)ethyl)hexan-1-amine
(R)-6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)-N-(2-ethoxy-2-(4-ethoxy-3-(ethoxymethyl)phenyl)ethyl)hexan-1-amine
Catalogue No.:PA 22 0441011
CAS :
1582675-91-9
Molecular Formula : C30H45Cl2NO5
Molecular Weight : 570.59


(R)-4-(2-((6-((2,6-Dichlorobenzyl)oxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol 2,2,2-triphenylacetate
(R)-4-(2-((6-((2,6-Dichlorobenzyl)oxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol 2,2,2-triphenylacetate
Catalogue No.:PA 22 0441012
CAS :
NA
Molecular Formula : C42H45Cl2NO6
Molecular Weight : 730.72


(R)-4-(2-((6-(2-((2,4-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenyl 2,2,2-triphenylacetate
(R)-4-(2-((6-(2-((2,4-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenyl 2,2,2-triphenylacetate
Catalogue No.:PA 22 0441013
CAS :
2512208-87-4
Molecular Formula : C44H47Cl2NO6
Molecular Weight : 756.76


4,4'-((1R,1'R)-((Oxybis(hexane-6,1-diyl))bis(azanediyl))bis(1-hydroxyethane-2,1-diyl))bis(2-(hydroxymethyl)phenol) bis(2,2,2-triphenylacetate)
4,4'-((1R,1'R)-((Oxybis(hexane-6,1-diyl))bis(azanediyl))bis(1-hydroxyethane-2,1-diyl))bis(2-(hydroxymethyl)phenol) bis(2,2,2-triphenylacetate)
Catalogue No.:PA 22 0441014
CAS :
NA
Molecular Formula : C70H80N2O11
Molecular Weight : 1125.41

![(1R)-2-[[6-[2-[(2,6-Dichlorobenzyl)oxy]ethoxy]hexy PA 22 0441017](https://www.pharmaffiliates.com/pimages/PA220441017.jpg)
(1R)-2-[[6-[2-[(2,6-Dichlorobenzyl)oxy]ethoxy]hexyl]amino]-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)ethanol
(1R)-2-[[6-[2-[(2,6-Dichlorobenzyl)oxy]ethoxy]hexyl]amino]-1-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)ethanol
Catalogue No.:PA 22 0441017
CAS :
503068-37-9
Molecular Formula : C27H37Cl2NO5
Molecular Weight : 526.5


(2R,3R,4S,5R,6R)-2-(((1S,2R,3R)-1-((2R,6R)-4-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-2-hydroxy-6-(4-hydroxy-3-(hydroxymethyl)phenyl)morpholin-2-yl)-1,3,4-trihydroxybutan-2-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol
(2R,3R,4S,5R,6R)-2-(((1S,2R,3R)-1-((2R,6R)-4-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-2-hydroxy-6-(4-hydroxy-3-(hydroxymethyl)phenyl)morpholin-2-yl)-1,3,4-trihydroxybutan-2-yl)oxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol
Catalogue No.:PA 22 0441019
CAS :
NA
Molecular Formula : C36H53Cl2NO15
Molecular Weight : 810.71


(R)-N-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-N-(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)nitrous Amide
(R)-N-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-N-(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)nitrous Amide
Catalogue No.:PA 22 0441020
CAS :
NA
Molecular Formula : C24H32Cl2N2O6
Molecular Weight : 515.43


(R)-3-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
(R)-3-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
Catalogue No.:PAI 22 044001
CAS :
503068-36-8
Molecular Formula : C28H35Cl2NO6
Molecular Weight : 552.49


tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)carbamate
tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)carbamate
Catalogue No.:PAI 22 044003
CAS :
NA
Molecular Formula : C29H41Cl2NO7
Molecular Weight : 586.55


tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)-2-ethoxyethyl)carbamate
tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)-2-ethoxyethyl)carbamate
Catalogue No.:PAI 22 044004
CAS :
NA
Molecular Formula : C34H49Cl2NO7
Molecular Weight : 654.67


(R)-3-(6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
(R)-3-(6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
Catalogue No.:PAI 22 044012
CAS :
1228049-11-3
Molecular Formula : C28H35Cl2NO6
Molecular Weight : 552.49


(R)-3-(6-(2-((2,4-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
(R)-3-(6-(2-((2,4-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
Catalogue No.:PAI 22 044013
CAS :
NA
Molecular Formula : C28H35Cl2NO6
Molecular Weight : 552.49


tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-ethoxy-2-(4-ethoxy-3-(ethoxymethyl)phenyl)ethyl)carbamate
tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-ethoxy-2-(4-ethoxy-3-(ethoxymethyl)phenyl)ethyl)carbamate
Catalogue No.:PAI 22 044014
CAS :
NA
Molecular Formula : C35H53Cl2NO7
Molecular Weight : 670.71


(R)-4-(2-((6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
(R)-4-(2-((6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-(hydroxymethyl)phenol
Catalogue No.:PA 22 0441022
CAS :
503069-68-9
Molecular Formula : C24H33Cl2NO5
Molecular Weight : 486.43


(R)-2-((6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethan-1-ol
(R)-2-((6-(2-((2,5-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethan-1-ol
Catalogue No.:PAI 22 044016
CAS :
1228049-23-7
Molecular Formula : C27H37Cl2NO5
Molecular Weight : 526.5


(R)-3-(5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
(R)-3-(5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)-5-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)oxazolidin-2-one
Catalogue No.:PAI 22 044017
CAS :
503070-65-3
Molecular Formula : C27H33Cl2NO6
Molecular Weight : 538.46


(R)-2-((5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethan-1-ol
(R)-2-((5-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)pentyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethan-1-ol
Catalogue No.:PAI 22 044018
CAS :
503070-67-5
Molecular Formula : C26H35Cl2NO5
Molecular Weight : 512.47


2-((tert-Butoxycarbonyl)(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethyl 4-nitrobenzoate
2-((tert-Butoxycarbonyl)(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethyl 4-nitrobenzoate
Catalogue No.:PAI 22 044020
CAS :
NA
Molecular Formula : C39H48Cl2N2O10
Molecular Weight : 775.72


tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)-2-hydroxyethyl)carbamate
tert-Butyl (R)-(6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)-2-hydroxyethyl)carbamate
Catalogue No.:PAI 22 044021
CAS :
NA
Molecular Formula : C32H45Cl2NO7
Molecular Weight : 626.61


tert-Butyl (6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)-2-hydroxyethyl)carbamate
tert-Butyl (6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)(2-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)-2-hydroxyethyl)carbamate
Catalogue No.:PAI 22 044022
CAS :
NA
Molecular Formula : C32H45Cl2NO7
Molecular Weight : 626.61


(R)-3-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(4-hydroxy-3-(hydroxymethyl)phenyl)oxazolidin-2-one
(R)-3-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(4-hydroxy-3-(hydroxymethyl)phenyl)oxazolidin-2-one
Catalogue No.:PAI 22 044023
CAS :
NA
Molecular Formula : C25H31Cl2NO6
Molecular Weight : 512.42


(R)-3-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(3-(ethoxymethyl)-4-hydroxyphenyl)oxazolidin-2-one
(R)-3-(6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)-5-(3-(ethoxymethyl)-4-hydroxyphenyl)oxazolidin-2-one
Catalogue No.:PAI 22 044024
CAS :
NA
Molecular Formula : C27H35Cl2NO6
Molecular Weight : 540.48


2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethyl 4-nitrobenzoate
2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(2,2-dimethyl-4H-benzo[d][1,3]dioxin-6-yl)ethyl 4-nitrobenzoate
Catalogue No.:PAI 22 044025
CAS :
NA
Molecular Formula : C34H40Cl2N2O8
Molecular Weight : 675.60


(R)-2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(4-ethoxy-3-(hydroxymethyl)phenyl)ethan-1-ol
(R)-2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-(4-ethoxy-3-(hydroxymethyl)phenyl)ethan-1-ol
Catalogue No.:PAI 22 044026
CAS :
NA
Molecular Formula : C26H37Cl2NO5
Molecular Weight : 514.48


2-(((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)amino)methyl)-4-(2-((6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)phenol
2-(((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)(2-hydroxy-2-(4-hydroxy-3-(hydroxymethyl)phenyl)ethyl)amino)methyl)-4-(2-((6-(2-((2,6-dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)phenol
Catalogue No.:PA 22 0441024
CAS :
2057437-62-2
Molecular Formula : C48H64Cl4N2O9
Molecular Weight : 954.85


(R)-5-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-hydroxybenzaldehyde 2,2,2-Trifluoroacetate
(R)-5-(2-((6-(2-((2,6-Dichlorobenzyl)oxy)ethoxy)hexyl)amino)-1-hydroxyethyl)-2-hydroxybenzaldehyde 2,2,2-Trifluoroacetate
Catalogue No.:PA 22 0441026
CAS :
NA
Molecular Formula : C26H32Cl2F3NO7
Molecular Weight : 598.44