Using CCOc1cc(CN2CCC(Nc3ccc(C(=O)O)cn3)CC2)cc(OCC)c1Cl, NCCO to produce CCOc1cc(CN2CCC(Nc3ccc(C(=O)NCCO)cn3)CC2)cc(OCC)c1Cl, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.