fesoterodine fumarate and its Impurities
A muscarinic acetylcholine receptor inhibitor, Fesoterodine Fumarate is used for the treatment of overactive bladder syndrome. It is a prodrug and is de-esterified to its active metabolite.. Reference standards of Fesoterodine Fumarate API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below


(R,E)-4-((3-(3-(Diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl)oxy)-4-oxobut-2-enoic Acid
(R,E)-4-((3-(3-(Diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl)oxy)-4-oxobut-2-enoic Acid
Catalogue No.:PA 06 16530
CAS :
1428856-47-6
Molecular Formula : C26H33NO5
Molecular Weight : 439.54


2-(3-(Diisopropylamino)-1-phenylpropyl)-4-((isobutyryloxy)methyl)phenyl isobutyrate Fumarate
2-(3-(Diisopropylamino)-1-phenylpropyl)-4-((isobutyryloxy)methyl)phenyl isobutyrate Fumarate
Catalogue No.:PA 06 0161001
CAS :
1428856-48-7
Molecular Formula : C34H47NO8
Molecular Weight : 597.75


2-((S)-3-(Diisopropylamino)-1-phenylpropyl)-4-(((3-((S)-3-(diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl)oxy)methyl)phenyl Isobutyrate Fumarate
2-((S)-3-(Diisopropylamino)-1-phenylpropyl)-4-(((3-((S)-3-(diisopropylamino)-1-phenylpropyl)-4-hydroxybenzyl)oxy)methyl)phenyl Isobutyrate Fumarate
Catalogue No.:PA 06 0161005
CAS :
NA
Molecular Formula : C52H70N2O8
Molecular Weight : 851.14


(E)-4-((3-(3-(Diisopropylamino)-1-phenylpropyl)-4-(isobutyryloxy)benzyl)oxy)-4-oxobut-2-enoic Acid compound with Fumaric Acid (1:1)
(E)-4-((3-(3-(Diisopropylamino)-1-phenylpropyl)-4-(isobutyryloxy)benzyl)oxy)-4-oxobut-2-enoic Acid compound with Fumaric Acid (1:1)
Catalogue No.:PA 06 0161006
CAS :
1428856-54-5
Molecular Formula : C34H43NO10
Molecular Weight : 625.72


(E)-4-((3-(3-(Diisopropylamino)-1-phenylpropyl)-4-(isobutyryloxy)benzyl)oxy)-4-oxobut-2-enoic Acid
(E)-4-((3-(3-(Diisopropylamino)-1-phenylpropyl)-4-(isobutyryloxy)benzyl)oxy)-4-oxobut-2-enoic Acid
Catalogue No.:PA 06 0161012
CAS :
1428856-53-4
Molecular Formula : C30H39NO6
Molecular Weight : 509.64