. "7-{2-(2-Amino-thiazol-5-yl)-2-[(E)-1-carboxy-1-methyl-ethoxyimino]-acetylamino}-3-(4-hydroxy-pyrimidin-2-ylsulfanylmethyl)-8-oxo-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid" . "2" . . . . . . . . . . . . . . .