(4R,5S)-5-((1S,2R)-1-carboxylato-2-hydroxypropyl)-3-((6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazol-4-ium-6-yl)thio)-1-((4R,5S,6S)-3-((6,7-dihydro-5H-pyrazolo[1,2-a][1,2,4]triazol-4-ium-6-yl)thio)-6-((R)-1-hydroxyethyl)-4-methyl-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carbonyl)-4-methyl-4,5-dihydro-1H-pyrrole-2-carboxylate
