Using CCOC(=O)CC1CCc2c1[nH]c1ccc(OCc3ccc(S(C)(=O)=O)cc3)cc21 to produce CS(=O)(=O)c1ccc(COc2ccc3[nH]c4c(c3c2)CCC4CC(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.