VP3.15 dihydrobromide(Cat No.:I018061)is a potent and selective small-molecule inhibitor of calcineurin, a calcium/calmodulin-dependent phosphatase involved in T-cell activation and neuronal signaling. By blocking calcineurin activity, VP3.15 modulates NFAT (nuclear factor of activated T-cells) signaling, making it valuable for research in immunology, neurobiology, and inflammation. The dihydrobromide salt form enhances solubility and handling for laboratory applications. VP3.15 is particularly useful in exploring pathways related to immune suppression, synaptic plasticity, and neurodegenerative disease mechanisms, supporting therapeutic development in both autoimmune and neurological disorders.