Using COc1ccc2c(c1)CCC=C2c1ccc(OCCN2CCCC2)cc1 to produce COc1ccc2c(c1)CCC(Br)=C2c1ccc(OCCN2CCCC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.