Using CC(C)(C)OC(=O)N1CCC(=O)C1, C[Si](C)(C)C(F)(F)F to produce CC(C)(C)OC(=O)N1CCC(O)(C(F)(F)F)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.