Using OCC1CCN(c2ncc(Br)c(OC3CN(c4ccc5ccccc5n4)C3)n2)CC1 to produce OCC1CCN(c2nccc(OC3CN(c4ccc5ccccc5n4)C3)n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.