Using OCC(F)(F)F, O=c1c(-c2ccnn2-c2ccccc2)nn(-c2ccc(-n3cccn3)cc2F)c2ccoc12 to produce O=c1c(-c2ccnn2-c2ccccc2)nn(-c2ccc(-n3cccn3)cc2OCC(F)(F)F)c2ccoc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.