Using CCOC(=O)c1cc(CN)cnc1C(F)F, CC(C)(C)OC(=O)OC(=O)OC(C)(C)C to produce CCOC(=O)c1cc(CNC(=O)OC(C)(C)C)cnc1C(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.