Using COc1ccc(Br)c(CC2CCN(CCc3ccc(NC(=O)OC(C)(C)C)cc3)CC2)c1 to produce COc1ccc(Br)c(CC2CCN(CCc3ccc(N)cc3)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.