Using C[C@H](c1ccccc1)N1CCO[C@@H](c2ccc(C(=O)O)cc2)C1, NCCO to produce C[C@H](c1ccccc1)N1CCO[C@@H](c2ccc(C(=O)NCCO)cc2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.