(2S)-Benzhydryl 3-methyl-7-oxo-3-((Z)-triaz-1-en-1-ylmethyl)-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4,4-dioxide-15N is an inermediate in the synthesis of Tazobactam Sodium Salt-13C2,15N, which is the labeled analogue of Tazobactam Sodium Salt (T010100), which is a β-Lactamase inhibitor, used with β-lactam antibiotics to enhance their effect.