Cefminox and its Impurities
It is a second-generation cephalosporin antibiotic. It is especially effective against Gram-negative and anaerobic bacteria.Reference standards of Cefminox API, and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.


(6R,7S)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic Acid
(6R,7S)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxylic Acid
Catalogue No.:PA 56 84510
CAS :
NA
Molecular Formula : C16H21N7O7S3
Molecular Weight : 519.57


(6R,7S)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
(6R,7S)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
Catalogue No.:PA 56 84520
CAS :
NA
Molecular Formula : C14H19N3O7S2
Molecular Weight : 405.44


(6R,7S)-7-(2-Chloroacetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid;
(6R,7S)-7-(2-Chloroacetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid;
Catalogue No.:PA 56 84540
CAS :
57617-09-1
Molecular Formula : C13H15ClN6O5S2
Molecular Weight : 434.87


Sodium (6R,7S)-7-(2-(((R)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Sodium (6R,7S)-7-(2-(((R)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Catalogue No.:PA 56 84550
CAS :
NA
Molecular Formula : C16H20N7NaO7S3
Molecular Weight : 541.55


Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-methyl-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Catalogue No.:PA 56 84560
CAS :
NA
Molecular Formula : C14H18N3NaO7S2
Molecular Weight : 427.42


Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-Oxide
Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-Oxide
Catalogue No.:PA 56 84570
CAS :
NA
Molecular Formula : C16H20N7NaO8S3
Molecular Weight : 557.55


Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)sulfinyl)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)sulfinyl)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Catalogue No.:PA 56 84580
CAS :
NA
Molecular Formula : C16H20N7NaO8S3
Molecular Weight : 557.55


Sodium (6R,7R)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Sodium (6R,7R)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Catalogue No.:PA 56 84590
CAS :
NA
Molecular Formula : C16H20N7NaO7S3
Molecular Weight : 541.55


(6R,7S)-7-(2-(((R)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
(6R,7S)-7-(2-(((R)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
Catalogue No.:PA 56 84600
CAS :
75498-97-4
Molecular Formula : C16H21N7O7S3
Molecular Weight : 519.57


(6R,7R)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-((4-methyl-5-thioxo-4,5-dihydro-1H-tetrazol-1-yl)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
(6R,7R)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-((4-methyl-5-thioxo-4,5-dihydro-1H-tetrazol-1-yl)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
Catalogue No.:PA 56 84610
CAS :
NA
Molecular Formula : C16H21N7O7S3
Molecular Weight : 519.57


(6R,7S)-3-(Acetoxymethyl)-7-(2-(((R)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
(6R,7S)-3-(Acetoxymethyl)-7-(2-(((R)-2-amino-2-carboxyethyl)thio)acetamido)-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
Catalogue No.:PA 56 84620
CAS :
NA
Molecular Formula : C16H21N3O9S2
Molecular Weight : 463.48


(R)-2-((S)-(2-(((R)-2-Amino-2-carboxyethyl)thio)acetamido)(carboxy)(methoxy)methyl)-5-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic Acid
(R)-2-((S)-(2-(((R)-2-Amino-2-carboxyethyl)thio)acetamido)(carboxy)(methoxy)methyl)-5-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-3,6-dihydro-2H-1,3-thiazine-4-carboxylic Acid
Catalogue No.:PA 56 84630
CAS :
NA
Molecular Formula : C16H23N7O8S3
Molecular Weight : 537.58


S-(2-(((5aR,6S)-6-Methoxy-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)amino)-2-oxoethyl)-L-cysteine
S-(2-(((5aR,6S)-6-Methoxy-1,7-dioxo-1,4,5a,6-tetrahydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl)amino)-2-oxoethyl)-L-cysteine
Catalogue No.:PA 56 84640
CAS :
NA
Molecular Formula : C14H17N3O7S2
Molecular Weight : 403.42


(6R,7R)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
(6R,7R)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
Catalogue No.:PA 56 84650
CAS :
NA
Molecular Formula : C16H21N7O7S3
Molecular Weight : 519.57


Sodium (6R,7S)-7-(2-(((R)-2-amino-2-carboxylatoethyl)thio)acetamido)-3-(hydroxymethyl)-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Sodium (6R,7S)-7-(2-(((R)-2-amino-2-carboxylatoethyl)thio)acetamido)-3-(hydroxymethyl)-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Catalogue No.:PA 56 84660
CAS :
NA
Molecular Formula : C14H17N3Na2O8S2
Molecular Weight : 465.4


(6R,7S)-7-(2-(((R)-2-Amino-2-carboxyethyl)sulfinyl)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
(6R,7S)-7-(2-(((R)-2-Amino-2-carboxyethyl)sulfinyl)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid
Catalogue No.:PA 56 84670
CAS :
NA
Molecular Formula : C16H21N7O8S3
Molecular Weight : 535.57


Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-3-(hydroxymethyl)-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Sodium (6R,7S)-7-(2-(((S)-2-amino-2-carboxyethyl)thio)acetamido)-3-(hydroxymethyl)-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate
Catalogue No.:PA 56 0841000
CAS :
NA
Molecular Formula : C14H18N3NaO8S2
Molecular Weight : 443.42


Sodium (6R,7S)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate Heptahydrate
Sodium (6R,7S)-7-(2-(((S)-2-Amino-2-carboxyethyl)thio)acetamido)-7-methoxy-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate Heptahydrate
Catalogue No.:PA 56 0841002
CAS :
92636-39-0
Molecular Formula : C16H34N7NaO14S3
Molecular Weight : 667.65