(6R,7R)-7-Amino-3-((1-methyl-1H-tetrazol-5-ylthio)methyl)-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid ; CAS # 24209-38-9 ;

(6R,7R)-7-[[(2R)-2-[[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonyl] amino]-2-(4-hydroxyphenyl)acetyl]amino]-3-[[(1-methyl-1H-tetrazol-5-yl) sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ; CAS # 62893-19-0 ;

Cefoperazone Lactone Impurity ; (5aR,6R)-6-[[(2R)-2-[[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonyl]amino]-2-(4-hydroxyphenyl)acetyl]amino]-5a,6-dihydro-3H,7H-azeto[2,1-b]furo[3,4-d] [1,3] thiazine-1,7(4H)-dione ; CAS # 73240-08-1 ;

Cefoperazone Thioxo Impurity ; (6R,7R)-7-[[(2R)-2-[[(4-Ethyl-2,3-dioxopiperazin-1-yl)carbonyl]-amino]-2-(4-hydroxyphenyl)acetyl]amino]-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 ;

1-Methyl-1H-tetrazole-5-thiol ; CAS# 13183-79-4 ;

(6R,7R)-7-Amino-8-oxo-3-[(1H-1,2,3-triazol-4-ylsulfanyl)methyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ; CAS # 37539-03-0 ;

7-Aminocephalosporanic Acid (7-ACA) ; (6R,7R)-3-[(Acetyloxy)methyl]-7-amino-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid ; CAS # 957-68-6 ;

Cefoperazone 7-Epimer ; (6R,7S)-Cefoperazone Sodium ; (6R,7S)-7-[[(2R)-2-[[(4-Ethyl-2,3-dioxopiperazine-1-yl)-carbonyl]amino]-2-(4-hydroxyphenyl)acetyl]amino]-3-[[(1-methyl-1H-tetrazol-5-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carb

7-ACA Tetrazole ; (6R,7R)-3-((1H-Tetrazol-5-ylthio)methyl)-7-amino-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid ; CAS # 58016-87-8 ;

Sodium (6R,7R)-7-[[(2R)-2-[[(4-ethyl-2,3-dioxopiperazin-1-yl)carbonyl] amino]-2-(4-hydroxyphenyl)acetyl]amino]-3-[[(1-methyl-1H-tetrazol-5-yl) sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate ; CAS # 62893-20-3 ;