Using O=C(CBr)Nc1ccc(Cl)cn1, CCOC(=O)c1cc(OCCOCCOC)n[nH]1 to produce CCOC(=O)c1cc(OCCOCCOC)nn1CC(=O)Nc1ccc(Cl)cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.