Using CCSc1ccccc1-c1nc2cc(Br)cnc2n1C, COC(=O)C(F)(F)F to produce CCSc1ccccc1-c1nc2cc(C(=O)C(F)(F)F)cnc2n1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.