Using COS(C)(=O)=O, CC(C)(C)OC(=O)N1CCC(CNC(=O)C(F)(F)F)CC1 to produce CN(CC1CCN(C(=O)OC(C)(C)C)CC1)C(=O)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.