Using BrCc1ccccc1, CCn1c(=O)n(CC)c2cc(-c3[nH]cnc3-c3cccc(C)c3)ccc21 to produce CCn1c(=O)n(CC)c2cc(-c3c(-c4cccc(C)c4)ncn3Cc3ccccc3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.