Using CCCCOC(=O)N(Cc1ccc(OC)cc1)S(=O)(=O)NCC(=O)OCC to produce CCOC(=O)CNS(=O)(=O)NCc1ccc(OC)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.