Using CN1C(=O)COc2cc(N3C[C@H](C(N)=O)OC3=O)ccc21, NCCF to produce CN1C(=O)COc2cc(N3C[C@H](C(=O)NCCF)OC3=O)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.