Synonyms: Bmy-25174;(5r,6s)-6-[(1r)-1-hydroxyethyl]-3-{[(1-methylpyridinium-2-yl)methyl]sulfanyl}-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate;97534-02-6;Bmy 25174;AC1L3YUJ;KST-1A9191;AR-1A6481;(5R,6S)-6-[(1R)-1-hydroxyethyl]-3-[(1-methylpyridin-1-ium-2-yl)methylsulfanyl]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate;3-((N-Methylpyridinium)-2-yl-methylthio)-6-(1-hydroxyethyl)-7-oxo-1-azabicyclo(3.2.0)hept-2-ene-2-carboxylate;Pyridinium, 2-(((2-carboxy-6-(1-hydroxyethyl)-7-oxo-1-azabicyclo(3.2.0)hept-2-en-3-yl)thio)methyl)-1-methyl-, hydroxide, inner salt, (5R-(5alpha,6alpha(R*)))-