Using CC(=O)N1CC(C)(C)c2ccc(N)cc21, O=c1[nH]c2ccccc2c(=O)o1 to produce CC(=O)N1CC(C)(C)c2ccc(NC(=O)c3ccccc3N)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.