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
(1R,5S,6S)-2-[(6,7-dihydro-5H-pyrazolo[1,2-a] [1,2,4] triazolium-6-yl)]-thio-6-[(R)-1-hydroxyethyl]-1-methyl-carbapenem-3-carboxylate