Using O=C(Cl)CCCCCl, NNC(=O)N1Cc2ccccc2Oc2ccc(Cl)cc21 to produce O=C(CCCCCl)NNC(=O)N1Cc2ccccc2Oc2ccc(Cl)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.