Imipenem (MK-0787) is a broad-spectrum, semi-synthetic beta-lactam carbapenem that has broad antibacterial activity against gram-negative and gram-positive aerobic and anaerobic bacteria.

N-Butanoyl-L-homoserine lactone is a cleavable ADC linker used in the synthesis of antibody-drug conjugates (ADCs).

Mecillinam, an extended-spectrum penicillin antibiotic, is considered to be active against Gram-negative bacteria by binding specifically to penicillin-binding protein 2 (PBP2).