Using Oc1cccc(F)c1, O=C(CBr)CC(=O)Nc1ccc(N2CCOCC2)c(F)c1 to produce O=C(COc1cccc(F)c1)CC(=O)Nc1ccc(N2CCOCC2)c(F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.