Using CCOC(=O)c1sc(-c2cn(CC(F)(F)c3ccccc3)nn2)nc1C to produce Cc1nc(-c2cn(CC(F)(F)c3ccccc3)nn2)sc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.