Ceftriaxone EP Impurity B

Chemical Name: (5aR,6R)-6-[[(2Z)-(2-aminothiazol-4-yl)(methoxyimino)acetyl]amino]-5a,6-dihydro-3H,7H-azeto[2,1-b]furo[3,4-d][1,3]thiazine-1,7(4H)-dione (as per EP) ; (Z)-2-(2-Aminothiazol-4-yl)-N-{(5aR,6R)-1,7-dioxo-1,3,4,5a,6,7-hexahydroazeto[2,1-b]furo[3,4-d][1,3]thiazin-6-yl}-2-(methoxyimino)acetamide (as per USP)

Synonym: 1,3-di(1H-1,2,4-triazol-1-yl)propan-2-one

Smile: [H][C@@]12[C@@H](C(N1C3=C(CS2)COC3=O)=O)NC(/C(C4=CSC(N)=N4)=N\OC)=O