Using O=C(O)CCC(CC=Cc1cccnc1)CCCCNS(=O)(=O)c1ccc(Cl)cc1 to produce O=C(O)CCC(CCCCNS(=O)(=O)c1ccc(Cl)cc1)CCCc1cccnc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.