118680-12-9 3-(Catechol-4-ylcarbonyloxy)methylcephalosporin 5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-(((2-amino-4-thiazolyl)((1-carboxy-1-methylethoxy)imino)acetyl)amino)-3-(((3,4-dihydroxybenzoyl)oxy)methyl)-8-oxo-, (6R-(6alpha,7beta(Z)))- 7-(2- (2-Aminothiazol-4-yl)-2-(1-carboxy-1-methylethoxyimino)acetamido)-3-(3,4-dihydroxybenzoyloxy)methyl-3-cephem-4-carboxylic acid Methyl-attac-cephem