Using CC(C)(C)OC(=O)NCC(=O)O, Cc1nc(NN)nnc1-c1ccccc1 to produce Cc1nc(NNC(=O)CNC(=O)OC(C)(C)C)nnc1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.