paroxetine and its Impurities
Paroxetine is used to treat depression, panic attacks, obsessive-compulsive disorder, anxiety disorders, and post-traumatic stress disorder. It is sold under the brand names Paxil and Seroxat. It is currently available as a generic medication.Reference standards of Paroxetine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

![tert-Butyl (3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy PAI 16 306006](https://www.pharmaffiliates.com/pimages/PAI16306006.jpg)
tert-Butyl (3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-methoxyphenyl)piperidine-1-carboxylate
tert-Butyl (3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-methoxyphenyl)piperidine-1-carboxylate
Catalogue No.:PAI 16 306006
CAS :
NA
Molecular Formula : C25H31NO6
Molecular Weight : 441.52

![tert-Butyl (3R,4S)-3-((benzo[d][1,3]dioxol-5-yloxy PAI 16 306016](https://www.pharmaffiliates.com/pimages/PAI16306016.jpg)
tert-Butyl (3R,4S)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate
tert-Butyl (3R,4S)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate
Catalogue No.:PAI 16 306016
CAS :
179179-81-8
Molecular Formula : C24H28FNO5
Molecular Weight : 429.49


tert-Butyl (3S,4R)-4-(4-fluorophenyl)-3-(((methylsulfonyl)oxy)methyl)piperidine-1-carboxylate
tert-Butyl (3S,4R)-4-(4-fluorophenyl)-3-(((methylsulfonyl)oxy)methyl)piperidine-1-carboxylate
Catalogue No.:PAI 16 306018
CAS :
200572-34-5
Molecular Formula : C18H26FNO5S
Molecular Weight : 387.47

![1-((3S,4R)-3-((Benzo[d][1,3]dioxol-5-yloxy)methyl) PAI 16 306020](https://www.pharmaffiliates.com/pimages/PAI16306020.jpg)
1-((3S,4R)-3-((Benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidin-1-yl)-2-(1H-indol-3-yl)ethan-1-one
1-((3S,4R)-3-((Benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidin-1-yl)-2-(1H-indol-3-yl)ethan-1-one
Catalogue No.:PAI 16 306020
CAS :
NA
Molecular Formula : C29H27FN2O4
Molecular Weight : 486.54

![2-Chloroethyl (3R,4S)-3-((benzo[d][1,3]dioxol-5-yl PAI 16 306021](https://www.pharmaffiliates.com/pimages/PAI16306021.jpg)
2-Chloroethyl (3R,4S)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate
2-Chloroethyl (3R,4S)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate
Catalogue No.:PAI 16 306021
CAS :
NA
Molecular Formula : C22H23ClFNO5
Molecular Weight : 435.88

![1-Chloroethyl (3S,4R)-3-((benzo[d][1,3]dioxol-5-yl PAI 16 306022](https://www.pharmaffiliates.com/pimages/PAI16306022.jpg)
1-Chloroethyl (3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate
1-Chloroethyl (3S,4R)-3-((benzo[d][1,3]dioxol-5-yloxy)methyl)-4-(4-fluorophenyl)piperidine-1-carboxylate
Catalogue No.:PAI 16 306022
CAS :
NA
Molecular Formula : C22H23ClFNO5
Molecular Weight : 435.88