Using BrCC1CC1, CC(C)(CO)NC(=O)c1nn(-c2cnc(Br)cn2)c2c1C[C@H]1C[C@@H]21 to produce CC(C)(CO)NC(=O)c1nn(-c2cnc(CC3CC3)cn2)c2c1C[C@H]1C[C@@H]21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.