Using CCOC(=O)CC1CCNCC1F, CN(CC=O)C(=O)OC(C)(C)C to produce CCOC(=O)CC1CCN(CCN(C)C(=O)OC(C)(C)C)CC1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.