Using O=C(O)c1c[nH]c(=O)o1, NCCC1CN(C(=O)OCc2cc(Cl)cc(Cl)c2)CCO1 to produce O=C(NCCC1CN(C(=O)OCc2cc(Cl)cc(Cl)c2)CCO1)c1c[nH]c(=O)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.