Using BrCc1ccccc1, Cc1nc2c([nH]1)c(=O)[nH]c(=O)n2C to produce Cc1nc2c(c(=O)[nH]c(=O)n2C)n1Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.