Using CCOC(=O)CBr, Oc1ccc(F)c(NCc2cccc(-c3cccc(F)c3)c2)c1F to produce CCOC(=O)COc1ccc(F)c(NCc2cccc(-c3cccc(F)c3)c2)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.