Using C=C(C)C1N(CC(=O)F)C(=O)CC(c2cccc(Cl)c2)C12C(=O)Nc1cc(Cl)ccc12, NCCO to produce C=C(C)C1N(CC(=O)NCCO)C(=O)CC(c2cccc(Cl)c2)C12C(=O)Nc1cc(Cl)ccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.