. "(6R,7S)-3-Chloro-7-[(S)-2-(2,3-dihydroxy-benzoylamino)-6-(3-{[4-(2,3-dihydroxy-benzoylamino)-butyl]-[3-(2,3-dihydroxy-benzoylamino)-propyl]-carbamoyl}-propionylamino)-hexanoylamino]-8-oxo-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid" . "8" . . . . . . .