Using Cn1cc(-c2ccc(NC(=O)OC(C)(C)C)cc2)cc1C(=O)O, COC(=O)c1nc(N)cn1C to produce COC(=O)c1nc(NC(=O)c2cc(-c3ccc(N)cc3)cn2C)cn1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.