Using CCOC(=O)n1nc(NC(=O)c2ccc(F)cc2)c2c1C(C)(C)N(C(=O)OC(C)(C)C)C2 to produce CCOC(=O)n1nc(NC(=O)c2ccc(F)cc2)c2c1C(C)(C)NC2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.