1-Azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 3-((2-(acetylamino)ethenyl)sulfinyl)-6-(1-hydroxyethyl)-7-oxo-, (5R-(3(R*(E)),5alpha,6beta(S*)))- 83310-72-9 Antibiotic C 19393E5 C-19393 E(5)