['CC(N)C(=O)NC(C)(C)C', 'Cc1[nH]c2ccccc2c1CC=O', 'CC(C)(C)N', 'Cc1[nH]c2ccccc2c1CC(=O)NC(C)C=O', 'CCC(=O)NC(C)(C)C', 'Cc1[nH]c2ccccc2c1CC(N)=O', 'CC(C)C', 'Cc1[nH]c2ccccc2c1CC(=O)NC(C)C(N)=O', 'Cc1cc2ccccc2[nH]1', 'CC(=O)NC(C)C(=O)NC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2[nH]ccc2c1.