Using O=C(Cl)c1cccnc1Cl, Clc1cccc(Cl)c1-c1cc[nH]c1 to produce O=C(c1cc(-c2c(Cl)cccc2Cl)c[nH]1)c1cccnc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.