. "4-((6S,7S)-7-{2-(2-Amino-thiazol-4-yl)-2-[(Z)-cyclopentyloxyimino]-acetylamino}-2-carboxy-8-oxo-4-oxa-1-aza-bicyclo[4.2.0]oct-2-en-3-ylmethylsulfanyl)-1-dimethylcarbamoylmethyl-pyridinium; hydrogen sulfate" . "11d" . . . . . . . . . . .