Using CCOC(=O)Cn1nnc(-c2cnc(N3CCC(O)CC3)nc2)n1, Oc1cc(Br)ccc1Cl to produce CCOC(=O)Cn1nnc(-c2cnc(N3CCC(Oc4cc(Br)ccc4Cl)CC3)nc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.