Using CCCc1c(C(=O)OCC)c(=O)cc(-c2ccc(Cl)cc2)n1C to produce CCCc1c(C(=O)O)c(=O)cc(-c2ccc(Cl)cc2)n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.