Using CCCn1c(=O)c2[nH]c(C3CCC(=O)C3)nc2n(CCC)c1=O, BrCc1ccccc1 to produce CCCn1c(=O)c2c(nc(C3CCC(=O)C3)n2Cc2ccccc2)n(CCC)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.