Using CCCCOc1cc(C(=O)O)cc(S(N)(=O)=O)c1C(=O)c1ccccc1 to produce CCCCOc1cc(C(=O)O)cc(S(N)(=O)=O)c1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.