Using O=C1Nc2ccc(Br)cc2C(c2ccccc2)=NC1OC(=O)C(F)(F)F to produce O=C1Nc2ccc(Br)cc2C(c2ccccc2)=NC1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.