Using O=CCOc1cc(Cl)c(OCc2ccccc2Cl)c(Cl)c1, BrC(Br)(Br)Br to produce Clc1ccccc1COc1c(Cl)cc(OCC=C(Br)Br)cc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.