87286-08-6 CM 40874 CM-40874 Pyridinium, 2-(((7-(((2-amino-4-thiazolyl)((1-carboxy-1-methylethoxy)imino)acetyl)amino)-2-carboxy-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-en-3-yl)methyl)thio)-1-(2-propenyl)-, hydroxide, inner salt, S-oxide, (6R-(6alpha,7beta(Z)))-