Using C1CNC2C(C1)CCCC2N1CCCC1, O=C(O)Cc1ccc(Cl)c(Cl)c1 to produce O=C(Cc1ccc(Cl)c(Cl)c1)N1CCCC2CCCC(N3CCCC3)C21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.