(5R,6S)-6-((1R)-1-Hydroxyethyl)-3-(hydroxymethyl)-7-oxo-4-thia-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 3-carbamate 4-Thia-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylic acid, 3-(((aminocarbonyl)oxy)methyl)-6-(1-hydroxyethyl)-7-oxo-, (5R-(5alpha,6alpha(R*)))- 84845-57-8 84845-58-9 Ritipenem Ritipenem [INN]