Cefazolin- 13 C 2 , 15 N (Cephazolin- 13 C 2 , 15 N) is 13 C and 15 N labeled Cefazolin. Cefazolin (Cephazolin) is a first-generation cephalosporin antibiotic and can be used in varieties of bacterial infections research. Cefazolin has anti-inflammatory effect and can attenuate post-operative cognitive dysfunction (POCD).