5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 3-(((5-methyl-1,3,4-thiadiazol-2-yl)thio)methyl)-8-oxo-7-(2-(1H-tetrazol-1-yl)acetamido)-, mixed with sodium nitrite (1:4) Cefazolin mixed with sodium nitrite (1:4) Sodium nitrite mixed with cefazolin (4:1) XI0389950