4-Thia-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 3-((3-aminopropyl)thio)-6-(1-hydroxyethyl)-7-oxo-, (5R-(5alpha,6alpha(R*)))- 81036-52-4 Sch 33440 Sch-33440