Using CCOC(=O)C(C)(CC)CC, CCOC(=O)c1cc(C)n(Cc2cc(Br)ccc2O)n1 to produce CCOC(=O)c1cc(C)n(Cc2cc(Br)ccc2OCC(C)(CC)CC)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.