Using Cc1nc(-c2cnn(C)c2Br)c2c(Cl)ncnn12, CNCc1ccc(OC)cc1 to produce COc1ccc(CN(C)c2ncnn3c(C)nc(-c4cnn(C)c4Br)c23)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.