Synonyms: Imidazo[1,2-b]pyridazinium,1-[[(6R,7R)-7-[[(2Z)-(5-amino-1,2,4-thiadiazol-3-yl)(methoxyimino)acetyl]amino]-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]-,chloride (9CI);Imidazo[1,2-b]pyridazinium,1-[[7-[[(5-amino-1,2,4-thiadiazol-3-yl)(methoxyimino)acetyl]amino]-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl]-,chloride, [6R-[6a,7b(Z)]]-;Cefozopran monohydrochloride;Firstcin;1-{[(6R,7R)-7-{[(2Z)-2-(5-amino-1,2,4-thiadiazol-3-yl)-2-(methoxyimino)acetyl]amino}-2-carboxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-3-yl]methyl}-1H-imidazo[1,2-b]pyridazin-4-ium chloride;