1406-09-3 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-((phenylacetyl)amino)-, (2S-(2alpha,5alpha,6beta))-, monosodium salt 4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic