4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-((2-(2-methoxyphenoxy)-2,4-dimethyl-1-oxopentyl)amino)-3,3-dimethyl-7-oxo-, (2S-(2-alpha,5-alpha,6-beta))-, sodium salt XI0188700