['CNCC(=O)NC(C)(C)C', 'Cc1cc(C)n(C(C)C=O)n1', 'CC(C)(C)N', 'Cc1cc(C)n(C(C)C(=O)N(C)CC=O)n1', 'CC(=O)NC(C)(C)C', 'CNC(=O)C(C)n1nc(C)cc1C', 'CC(C)C', 'Cc1cc(C)n(C(C)C(=O)N(C)CC(N)=O)n1', 'Cc1cc(C)[nH]n1', 'CCC(=O)N(C)CC(=O)NC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cn[nH]c1.