Using CCOC(=O)C(=O)c1cc(CSc2cccc(Cl)c2)c(C(=O)OCC)n1C to produce Cn1c(C(=O)C(=O)O)cc(CSc2cccc(Cl)c2)c1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.