Using C=C(CNC(=O)OC(C)(C)C)C(F)(F)C(=O)c1cccnc1C(F)(F)F to produce C=C1CN=C(c2cccnc2C(F)(F)F)C1(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.