Using O=C1c2cc(OCc3ccc4cc(F)c(F)cc4n3)ccc2OCc2ncccc21 to produce OC1c2cc(OCc3ccc4cc(F)c(F)cc4n3)ccc2OCc2ncccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.