Tazobactam-15N,d2 (CL-298741-15N,d2) is 15N and deuterium labeled Tazobactam. Tazobactam (CL-298741) is a potent beta-lactamases inhibitor and penicillin antibiotic. Tazobactam has antibacterial activity. Tazobactam can be used for pneumonia research[1][2].