Using CC(C)(C)Cn1c(CBr)cc2cnc(C#N)nc21, O=C1CCNCC1 to produce CC(C)(C)Cn1c(CN2CCC(=O)CC2)cc2cnc(C#N)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.