Using CCOC(=O)CNC(C)(C)C, O=C(O)c1ccc(N2CC(F)(F)C2)c(OCC2CC2)n1 to produce CCOC(=O)CN(C(=O)c1ccc(N2CC(F)(F)C2)c(OCC2CC2)n1)C(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.