Using CC(C)(C)OC(=O)c1ccc(-n2[nH]cc(-n3ccnn3)c2=O)nc1 to produce O=C(O)c1ccc(-n2[nH]cc(-n3ccnn3)c2=O)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.