Using CC1(C)OC(=O)[C@@H](CCNc2ccc(S(=O)(=O)Nc3nccs3)cc2)O1 to produce O=C1[C@H](O)CCN1c1ccc(S(=O)(=O)Nc2nccs2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.