linezolid and its Impurities
An antibacterial drug which is used for the treatment of infections caused by Gram-positive bacteria. Linezolid belongs to oxazolidinone class of medicines, which are are protein synthesis inhibitors. Linezolid stops the growth and reproduction of bacteria by disrupting translation of messenger RNA (mRNA) into proteins in the ribosome. Reference standards of Linezolid API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.

![N-[(2S)-3-Amino-2-hydroxypropyl]-N-[3-fluoro-4-(4m PA 12 19660](https://www.pharmaffiliates.com/pimages/PA1219660.jpg)
N-[(2S)-3-Amino-2-hydroxypropyl]-N-[3-fluoro-4-(4morpholinyl) phenyl] acetamide Dihydrochloride
N-[(2S)-3-Amino-2-hydroxypropyl]-N-[3-fluoro-4-(4morpholinyl) phenyl] acetamide Dihydrochloride
Catalogue No.:PA 12 19660
CAS :
NA
Molecular Formula : C15H24Cl2FN3O3
Molecular Weight : 384.27


N-(3-(((R)-3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methoxy)-2-hydroxypropyl)-N-((3-(3-fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methyl)acetamide
N-(3-(((R)-3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methoxy)-2-hydroxypropyl)-N-((3-(3-fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methyl)acetamide
Catalogue No.:PA 12 19700
CAS :
NA
Molecular Formula : C33H41F2N5O9
Molecular Weight : 689.7


Linezolid Related Compound A ((R)-5-(azidomethyl)-3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one) (1367570)
Linezolid Related Compound A ((R)-5-(azidomethyl)-3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one) (1367570)
Catalogue No.:PA USP1367570
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


Linezolid Related Compound B ((S)-N-{[3-(3-fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl]methyl}t (1367581)
Linezolid Related Compound B ((S)-N-{[3-(3-fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl]methyl}t (1367581)
Catalogue No.:PA USP1367581
CAS :
216868-57-4
Molecular Formula : NA
Molecular Weight : NA


Linezolid Related Compound C ((S)-5-(aminomethyl)-3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one) (1367592)
Linezolid Related Compound C ((S)-5-(aminomethyl)-3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one) (1367592)
Catalogue No.:PA USP1367592
CAS :
168828-90-8
Molecular Formula : NA
Molecular Weight : NA


Linezolid Related Compound D ((R)-[3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl]methyl meth (1367606)
Linezolid Related Compound D ((R)-[3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl]methyl meth (1367606)
Catalogue No.:PA USP1367606
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


Linezolid R-Isomer (N-{[(R)-3-(3-Fluoro-4-morpholinophenyl)-2-oxo-5-oxazolidinyl]methyl}acetamide) (1367639)
Linezolid R-Isomer (N-{[(R)-3-(3-Fluoro-4-morpholinophenyl)-2-oxo-5-oxazolidinyl]methyl}acetamide) (1367639)
Catalogue No.:PA USP1367639
CAS :
NA
Molecular Formula : NA
Molecular Weight : NA


3-((3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methoxy)propane-1,2-diyl Dimethanesulfonate
3-((3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methoxy)propane-1,2-diyl Dimethanesulfonate
Catalogue No.:PA 12 0191005
CAS :
NA
Molecular Formula : C19H27FN2O10S2
Molecular Weight : 526.55


(S)-5-((Benzylamino)methyl)-3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one Hydrochloride
(S)-5-((Benzylamino)methyl)-3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one Hydrochloride
Catalogue No.:PA 12 0191008
CAS :
1236077-63-6
Molecular Formula : C21H25ClFN3O3
Molecular Weight : 421.9


(5S,5'S)-5,5'-((Benzylazanediyl)bis(methylene))bis(3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one)
(5S,5'S)-5,5'-((Benzylazanediyl)bis(methylene))bis(3-(3-fluoro-4-morpholinophenyl)oxazolidin-2-one)
Catalogue No.:PA 12 0191009
CAS :
NA
Molecular Formula : C35H39F2N5O6
Molecular Weight : 663.72

![2-[(2S)-3-[[3-Fluoro-4-(4-morpholinyl)phenyl]amino PA 12 0191017](https://www.pharmaffiliates.com/pimages/PA120191017.jpg)
2-[(2S)-3-[[3-Fluoro-4-(4-morpholinyl)phenyl]amino]-2-hydroxypropyl]-1H-isoindole-1,3(2H)-dione
2-[(2S)-3-[[3-Fluoro-4-(4-morpholinyl)phenyl]amino]-2-hydroxypropyl]-1H-isoindole-1,3(2H)-dione
Catalogue No.:PA 12 0191017
CAS :
2512195-95-6
Molecular Formula : C21H22FN3O4
Molecular Weight : 399.42


N,N-Bis{[[(5S)-3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-oxo-5-oxazolidinyl] methyl]}amine ;
N,N-Bis{[[(5S)-3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-oxo-5-oxazolidinyl] methyl]}amine ;
Catalogue No.:PA 12 0191022
CAS :
2307625-63-2
Molecular Formula : C28H33F2N5O6
Molecular Weight : 573.6

![N-[[(5S)-3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-ox PA 12 0191023](https://www.pharmaffiliates.com/pimages/PA120191023.jpg)
N-[[(5S)-3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-oxo-5-oxazolidinyl] methyl] N-methyl-acetamide
N-[[(5S)-3-[3-Fluoro-4-(4-morpholinyl)phenyl]-2-oxo-5-oxazolidinyl] methyl] N-methyl-acetamide
Catalogue No.:PA 12 0191023
CAS :
NA
Molecular Formula : C17H22FN3O4
Molecular Weight : 351.38


(S)-2-(2-((4-(5-(Acetamidomethyl)-2-oxooxazolidin-3-yl)-2-fluorophenyl)amino)ethoxy)acetic acid
(S)-2-(2-((4-(5-(Acetamidomethyl)-2-oxooxazolidin-3-yl)-2-fluorophenyl)amino)ethoxy)acetic acid
Catalogue No.:PA 12 0191028
CAS :
368891-69-4
Molecular Formula : C16H20FN3O6
Molecular Weight : 369.35


(S)-N-(4-(5-(Acetamidomethyl)-2-oxooxazolidin-3-yl)-2-fluorophenyl)-N-(2-hydroxyethyl)glycine
(S)-N-(4-(5-(Acetamidomethyl)-2-oxooxazolidin-3-yl)-2-fluorophenyl)-N-(2-hydroxyethyl)glycine
Catalogue No.:PA 12 0191029
CAS :
 368891-70-7
Molecular Formula : C16H20FN3O6
Molecular Weight : 369.35


2-((R)-3-(((S)-3-(1,3-Dioxoisoindolin-2-yl)-2-hydroxypropyl)(3-fluoro-4-morpholinophenyl)amino)-2-hydroxypropyl)isoindoline-1,3-dione
2-((R)-3-(((S)-3-(1,3-Dioxoisoindolin-2-yl)-2-hydroxypropyl)(3-fluoro-4-morpholinophenyl)amino)-2-hydroxypropyl)isoindoline-1,3-dione
Catalogue No.:PA 12 0191031
CAS :
1798014-14-8
Molecular Formula : C32H31FN4O7
Molecular Weight : 602.62


3-(((R)-3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methoxy)propane-1,2-diyl dimethanesulfonate
3-(((R)-3-(3-Fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methoxy)propane-1,2-diyl dimethanesulfonate
Catalogue No.:PA 12 0191041
CAS :
NA
Molecular Formula : C19H27FN2O10S2
Molecular Weight : 526.55


(S)-N-(3-Fluoro-4-morpholinophenyl)-N-(3-(N-((3-(3-fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methyl)acetamido)propyl)acetamide
(S)-N-(3-Fluoro-4-morpholinophenyl)-N-(3-(N-((3-(3-fluoro-4-morpholinophenyl)-2-oxooxazolidin-5-yl)methyl)acetamido)propyl)acetamide
Catalogue No.:PA 12 0191049
CAS :
NA
Molecular Formula : C31H39F2N5O6
Molecular Weight : 615.68


(R)-N-(3-(1,3-Dioxoisoindolin-2-yl)-2-hydroxypropyl)-N-(3-fluoro-4-morpholinophenyl)nitrous amide
(R)-N-(3-(1,3-Dioxoisoindolin-2-yl)-2-hydroxypropyl)-N-(3-fluoro-4-morpholinophenyl)nitrous amide
Catalogue No.:PA 12 0191052
CAS :
NA
Molecular Formula : C21H21FN4O5
Molecular Weight : 428.42