Brensocatib (formerly AZD7986) is reported as a second generation, oral, selective and reversible inhibitor of dipeptidyl peptidase 1 (DPP1; a.k.a. cathepsin C) [1
]. Cathepsin C is required for the activation of proinflammatory neutrophil serine proteases, making this enzyme a drug target whose pharmacological inhibition has potential in the treatment of diseases such as chronic obstructive pulmonary disease (COPD) which is driven in part by excessive neutrophil activation and dysregulated neutrophil elastase activity. The compound was originally developed by AstraZeneca, but is now being progressed by Insmed.