Using O=Cc1ccc(Cl)cc1Cl, CCOC(=O)c1ccn2nc(C)cc2c1 to produce CCOC(=O)c1ccn2nc(C)c(Cc3ccc(Cl)cc3Cl)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.