Using CCc1cc(CCCc2ccc(C(=O)OC)c(C(=O)OC)c2)ccc1O, CC(C)(C)C(=O)CBr to produce CCc1cc(CCCc2ccc(C(=O)OC)c(C(=O)OC)c2)ccc1OCC(=O)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.