Using COc1cc(C)c(S(=O)(=O)N2CCCCC2COCC(=O)OC(C)(C)C)c(C)c1 to produce COc1cc(C)c(S(=O)(=O)N2CCCCC2COCC(=O)O)c(C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.