Using Cn1ccc2cccc(C3=C(c4c[nH]c5c(CCCO)cccc45)C(=O)NC3=O)c21, BrC(Br)(Br)Br to produce Cn1ccc2cccc(C3=C(c4c[nH]c5c(CCCBr)cccc45)C(=O)NC3=O)c21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.