Using CCOC(=O)c1cc(CC(C)C)nc(S(C)(=O)=O)n1, CCOc1nc(CC)cc(C(=O)O)n1 to produce COc1nc(CC(C)C)cc(C(=O)O)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.