4628-27-7 EINECS 225-042-9 Sodium (2S-(2alpha,5alpha,6beta))-6-((3-(benzyloxy)-1,3-dioxo-2-phenylpropyl)amino)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)heptane-2-carboxylate