5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((aminophenylacetyl)amino)-3-methyl-8-oxo-, (6R-(6alpha,7beta(R*)))-, mixt. with (2R-cis)-(3-methyloxiranyl)phosphonic acid 90509-95-8 Kufaprim