QAV-680 is a pyrrolopyridine derivative patented by Novartis Pharma GmbH as chemoattractant receptor (CRTh2) antagonist for the treatment of an inflammatory or allergic condition, particularly an inflammatory or obstructive airways disease. QAV-680 shows low nM potency and excellent selectivity across a range of CRTh2 dependent primary human inflammatory cell assays. In preclinical studies, QAV-680 shows good pharmacokinetic properties (including a suitable escalating dose–exposure relationship) in the rat and mouse and demonstrates efficacy in both mechanistic and allergic disease CRTh2-dependent rodent in vivo models. In 2008-2010 QAV-680 was tested in Phase 2 clinical trials but no further development reports were published.