Using COc1cc2c(c(OC)c1)C(=O)CCC2, COc1ccc(Br)cc1 to produce COc1ccc(C2CCc3cc(OC)cc(OC)c3C2=O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.