1-Thia-thienamycin 4-Thia-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 3-((2-aminoethyl)thio)-6-(1-hydroxyethyl)-7-oxo-, (5R-(5alpha,6alpha(R*)))- 72888-55-2 Sch 33755 Sch-33755