Using CC(=O)N1c2ccc(-c3ccc(C(=O)O)nc3)cc2[C@H](Nc2cnc(C#N)cn2)C[C@@H]1C, NCCO to produce CC(=O)N1c2ccc(-c3ccc(C(=O)NCCO)nc3)cc2[C@H](Nc2cnc(C#N)cn2)C[C@@H]1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.