limited clinical efficacy of current symptomatic treatment and minute effect on progression of Alzheimer'sdisease has shifted the research focus from single targets towards multi-target-directed ligands. Here, a potent selective inhibitor of human butyrylcholinesterase was used as the starting point to develop a new series of multifunctional ligands. A focused library of derivatives was designed and
their ability to inhibit endopeptidase and exopeptidase activities of cathepsinB. For the most promising inhibitors, the ability to reduce extracellular and intracellular collagen IV degradation was determined, followed by their evaluation in cell-based in vitro models of tumor invasion. The presented data show that we have further defined the structural requirements for cathepsinB inhibition by nitroxoline