Using O=C(CBr)Nc1ccccn1, COc1ccc2ncnc(OCC3CCC(N)CC3)c2c1 to produce COc1ccc2ncnc(OCC3CCC(NCC(=O)Nc4ccccn4)CC3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.