Using Cc1cnc(-c2c(F)cccc2F)nn1, O=Cc1ccc(Cl)cc1 to produce OC(Cc1cnc(-c2c(F)cccc2F)nn1)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.