[(2S,5R)-2-carbamoyl-7-oxo-1,6-diazabicyclo[3.2.1]octan-6-yl] hydrogen sulfate
[(2S,5R)-2-carbamoyl-7-keto-1,6-diazabicyclo[3.2.1]octan-6-yl] hydrogen sulfate
[(2S,5R)-2-aminocarbonyl-7-oxo-1,6-diazabicyclo[3.2.1]octan-6-yl] hydrogen sulfate