Using CO[C@@H]1CCN(C(=O)c2cc3nccc(Oc4ccc5c(C(=O)O)c(C)sc5c4)c3s2)C1, NCCO to produce CO[C@@H]1CCN(C(=O)c2cc3nccc(Oc4ccc5c(C(=O)NCCO)c(C)sc5c4)c3s2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.