Using Cc1c(C(=O)O)sc2ncnc(Nc3cccnc3OCC(C)F)c12, NCCO to produce Cc1c(C(=O)NCCO)sc2ncnc(Nc3cccnc3OCC(C)F)c12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.