Using CC(=O)OCC1Cc2oc3c(Cl)cc(S(=O)(=O)c4ccccc4)cc3c2CN1C(=O)OC(C)(C)C to produce CC(C)(C)OC(=O)N1Cc2c(oc3c(Cl)cc(S(=O)(=O)c4ccccc4)cc23)CC1CO, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.