102253-70-3 DQ 2556 Pyridinium, 1-((7-(((2-amino-4-thiazolyl)(methoxyimino)acetyl)amino)-2-carboxy-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-en-3-yl)methyl)-4-(5-oxazolyl)-, hydroxide, inner salt, (6R-(6-alpha,7-beta(Z)))-