Using CCOC(=O)C(CC1CCOCC1)c1ccc2c(c1)N(C(=O)OC(C)(C)C)c1ccccc1S2(=O)=O to produce O=C(O)C(CC1CCOCC1)c1ccc2c(c1)Nc1ccccc1S2(=O)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.