Using CCCc1nc(CCOC)n2[nH]c(=O)nc2c1Cc1ccc(-c2ccccc2-c2nnn[nH]2)cc1, BrB(Br)Br to produce CCCc1nc(CBr)n2[nH]c(=O)nc2c1Cc1ccc(-c2ccccc2-c2nnn[nH]2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.