Using CCOC(=O)c1nnc2ccc(N)cc2c1O, CC1(C)CC(=O)CC(=O)C1 to produce CCOC(=O)c1nnc2ccc(NC3=CC(=O)CC(C)(C)C3)cc2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.