4-Thia-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 6-(1-hydroxyethyl)-7-oxo-3-((tetrahydro-3-thienyl)thio)-, S-oxide, monosodium salt, (5R-(5alpha,6alpha(R*)))- 96865-21-3 CP 65207 CP 81054 CP-65,207