Using CC(C)(C)O, CN(C(=O)c1ccc(Cl)c(Br)c1)c1ccccc1CCCC(=O)O to produce CN(C(=O)c1ccc(Cl)c(Br)c1)c1ccccc1CCCC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.