Using O=C1C(c2cccnc2)=C(c2cc(F)cc(F)c2)c2ccc(O)cc21, BrCCc1ccccc1 to produce O=C1C(c2cccnc2)=C(c2cc(F)cc(F)c2)c2ccc(OCCc3ccccc3)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.