. "1-{(6R,7R)-7-[2-[(Z)-2-(Acetyl-hydroxy-amino)-ethoxyimino]-2-(2-amino-thiazol-4-yl)-acetylamino]-2-carboxy-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-en-3-ylmethyl}-4-[(acetyl-hydroxy-amino)-methyl]-pyridinium" . "11d" . . . . . . . . . . . . . . . . .