Dual DDR1 and DDR2 inhibitor 5n is a highly potent and selective small molecule inhibitor targeting both Discoidin Domain Receptor 1 (DDR1) and Discoidin Domain Receptor 2 (DDR2). These receptors are receptor tyrosine kinases (RTKs) that play critical roles in cell proliferation, migration, and extracellular matrix (ECM) remodeling. Dysregulation of DDR1 and DDR2 has been implicated in various diseases, including cancer, fibrosis, and inflammation, making them attractive therapeutic targets.