Using Oc1c(F)ccc(-c2c3ccccc3c(Br)c3sc4ccccc4c23)c1F, COC(=O)CBr to produce COC(=O)COc1c(F)ccc(-c2c3ccccc3c(Br)c3sc4ccccc4c23)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.