Using C=CC(=O)Cl, Nc1cc2ncnc(Nc3cccc(Br)c3)c2cn1 to produce C=CC(=O)Nc1cc2ncnc(Nc3cccc(Br)c3)c2cn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.