(6R,7R)-7-(2-(((Z)-2-Cyanovinyl)thio)acetamido)-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid. 66474-36-0 Cefivitril Cefivitril [INN]