Using O=C(O)c1cc(F)cc2cnc(N[C@H]3CC[C@H](O)CC3)cc12, NCCO to produce O=C(NCCO)c1cc(F)cc2cnc(N[C@H]3CC[C@H](O)CC3)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.