3-((6,7-dihydro-5H-pyrazolo(1,2-a)(1,2,4)triazol-4-ium-6-yl)thio)-6-(1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo(3,2,0)hept-2-ene-2-carboxylate
5H-Pyrazolo(1,2-a)(1,2,4)triazol-4-ium, 6-((2-carboxy-6-(1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo(3.2.0)hept-2-en-3-yl)thio)-6,7-dihydro-, hydroxide, inner salt, (4R-(4alpha,5beta,6beta(R*)))-