26973-24-0 41136-22-5 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 8-oxo-7-((1H-tetrazol-1-ylacetyl)amino)-3-((1,3,4-thiadiazol-2-ylthio)methyl)-, monosodium salt, (6R-trans)- Ceftezole sodium Ceftezole sodium salt Celoslin Falomesin