Using O=C(Cn1cc(Nc2ncnc3cc(OCc4ccccc4)c(F)cc23)cn1)Nc1cccc(F)c1F to produce O=C(Cn1cc(Nc2ncnc3cc(O)c(F)cc23)cn1)Nc1cccc(F)c1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.