Using CCCCc1nc(Cl)c(C=O)n1Cc1ccc(CC(=O)OC)cc1 to produce CCCCc1nc(Cl)c(C=O)n1Cc1ccc(CC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.