Using CCc1nc(N2CC(NC(=O)c3nc(Cl)c(CC)[nH]3)C2)sc1C(=O)OC to produce CCc1nc(N2CC(NC(=O)c3nc(Cl)c(CC)[nH]3)C2)sc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.