英文别名
                        (6R)-7t-((Ξ)-5-benzyloxycarbonylamino-5-carboxy-pentanoylamino)-3-(5-dimethylamino-[1,3,4]thiadiazol-2-yl)-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid;7-[[5-carboxy-5-(phenylmethoxycarbonylamino)pentanoyl]amino]-3-[5-(dimethylamino)-1,3,4-thiadiazol-2-yl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid