Using c1nc[nH]n1, COCC1COC(CBr)(c2ccc(Cl)cc2Cl)O1 to produce COCC1COC(Cn2cncn2)(c2ccc(Cl)cc2Cl)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.