Ceftriaxone EP Impurity E

Chemical Name: (6R,7R)-7-amino-3-[[(2-methyl-5,6-dioxo-1,2,5,6-tetrahydro-1,2,4-triazin-3-yl)sulfanyl]methyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (as per EP); (6R,7R)-7-Amino-3-{[(6-hydroxy-2-methyl-5-oxo-2,5-dihydro-1,2,4-triazin-3-yl)thio]methyl}-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid (as per USP)

Synonym: 1H-​1,​2,​4-​Triazole, ion(1-​)​, sodium (1:1); 1H-1,2,4-Triazole, ion(1-), sodium (9CI); Sodium 1,2,4-triazole