Using CC(C)(C)OC(=O)CCCBr, COC(=O)c1ccc(O)c(C)c1 to produce COC(=O)c1ccc(OCCCC(=O)OC(C)(C)C)c(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.