Using O=C(O)CO, COc1cc(Nc2nc(-c3ccc(N)cc3)nn3c(C)nc(C)c23)cc(OC)c1OC to produce COc1cc(Nc2nc(-c3ccc(NC(=O)CO)cc3)nn3c(C)nc(C)c23)cc(OC)c1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.