Used primarily in pharmaceutical research as a potent and selective antagonist of the muscarinic M1 receptor subtype. It serves as a valuable tool compound for studying cholinergic signaling in the central nervous system. Its high selectivity allows scientists to isolate M1 receptor functions, aiding in the investigation of cognitive processes, memory formation, and neurodegenerative diseases such as Alzheimer's. Due to its ability to cross the blood-brain barrier, it is employed in in vivo studies to modulate M1 receptor activity and assess behavioral and neurological outcomes. Also utilized in receptor binding assays and functional studies to characterize new muscarinic agents.