Using CC(=O)CCC1(C(C)C)Cc2cc(OCC(=O)O)c(Cl)c(Cl)c2C1=O to produce CC(O)CCC1(C(C)C)Cc2cc(OCC(=O)O)c(Cl)c(Cl)c2C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.