7-(2 (2-aminothiazol-4-yl)-2-(1-carboxymethylethoxyimino)acetamido)-2-methyl-3-((1-methylpyridinium-4-yl)thiomethyl)-1-oxacephem-4-carboxylate
7-(2 (2-aminothiazol-4-yl)-2-(1-carboxymethylethoxyimino)acetamido)-2-methyl-3-((1-methylpyridinium-4-yl)thiomethyl)-1-oxacephem-4-carboxylate