Using Nc1cccc(O)c1, OCCc1cccc(Nc2nc(Cl)ncc2Cl)c1 to produce OCCc1cccc(Nc2nc(Nc3cccc(O)c3)ncc2Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.