Using CCCC1(C(O)CC=CCN(CCCCCCC(=O)OCC)S(C)(=O)=O)CCC1 to produce CCCC1(C(O)CC=CCN(CCCCCCC(=O)O)S(C)(=O)=O)CCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.