Using CC(C)(C)OC(=O)N[C@H]1COCC[C@H]1Nc1nc(-c2cnn(C(F)F)c2)c2c(c1F)CN(C(=O)OC(C)(C)C)C2=O to produce N[C@H]1COCC[C@H]1Nc1nc(-c2cnn(C(F)F)c2)c2c(c1F)CNC2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.