Using O=C(c1ccc2nccnc2c1)c1c(F)ccc(O)c1F, BrCc1ccccc1 to produce O=C(c1ccc2nccnc2c1)c1c(F)ccc(OCc2ccccc2)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.