(6R,7R)-7-((2R)-2-Hydroxy-2-phenylacetamido)-3-(pyrid-2-yl-N-oxide)thiomethylceph-3-em 4-carboxylic acid (6R-(6alpha,7beta(R)))-7-((Hydroxyphenylacetyl)amino)-8-oxo-3-((2-pyridinylthio) methyl)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid monooxide 56369-20-1 MCO