Using O=C(C(Br)Br)C(F)(F)F, CCOC(=O)C=Cc1cc(NN)ccc1Cl to produce CCOC(=O)C=Cc1cc(NN=CC(=O)C(F)(F)F)ccc1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.