Using Cc1nc(NC(=N)N)sc1C(=O)O, CCOC(=O)COc1ccc(N)cc1 to produce CCOC(=O)COc1ccc(NC(=O)c2sc(NC(=N)N)nc2C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.