Using CCC1(CCOc2cc(CC(=O)OC)ccc2Cl)CCN(c2nc3ccc(Cl)cc3s2)CC1 to produce CCC1(CCOc2cc(CC(=O)O)ccc2Cl)CCN(c2nc3ccc(Cl)cc3s2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.