Using COc1ccn2nc(-c3ccc(F)cc3)c(-c3ccncc3)c2c1 to produce Oc1ccn2nc(-c3ccc(F)cc3)c(-c3ccncc3)c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.