Disodium (6R,7R)-7-[[(2R)-2-hydroxy-2-phenyl-acetyl]amino]-8-oxo-3-[[1-(sulfonatomethyl)tetrazol-5-yl]sulfanylmethyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate;Cefonicid sodium;Cefonicid disodium;Disodium (6R,7R)-7-[[(2R)-2-hydroxy-2-phenyl-acetyl]amino]-8-oxo-3-[[1-(sulfonatomethyl)tetrazol-5-yl]sulfanylmethyl]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate; 

(7R)-7-(2-Hydroxy-2-phenylacetylamino)-6-oxo-3-{[1-(sulfomethyl)(1,2,3,4-tetraazol-5-ylthio)]methyl}-2H,7H,7aH-azetidino[2,1-b]1,3-thiazine-4-carboxylic acid;Cefonicid;