Avibactam Impurity 3(2R,5S)

(2R,5S)-7-Oxo-6-(sulfooxy)-1,6-diazabicyclo[3.2.1]octane-2-carboxamide Monosodium Salt may be useful in the preparation of optically-active diazabicyclooctane derivatives as β-lactamase inhibitor and its intermediates.