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(6R,7R)-7-Amino-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid24209-38-932 % similar Cefpiramide70797-11-431 % similar Cefamandole34444-01-430 % similar