Using COC(=O)Cc1csc2cc(OCc3ccc(Cl)cc3Cl)cc(C)c12 to produce Cc1cc(OCc2ccc(Cl)cc2Cl)cc2scc(CC(=O)O)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.