Using CCN(CC)Cc1sc(-c2nc(-c3ccc(C(=O)O)cc3)no2)cc1C, NCCO to produce CCN(CC)Cc1sc(-c2nc(-c3ccc(C(=O)NCCO)cc3)no2)cc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.