Using CCOC(=O)c1sc(NC(C)=O)c(C#N)c1C, O=C(CBr)c1ccccc1 to produce CCOC(=O)c1sc2c(c1C)c(N)c(C(=O)c1ccccc1)n2C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.