['CC(C)(C)CC=O', 'COc1ccc(S(=O)(=O)NCCN)cc1', 'CO', 'CC(C)(C)CC(=O)NCCNS(=O)(=O)c1ccccc1', 'CCNC(=O)CC(C)(C)C', 'COc1ccc(S(N)(=O)=O)cc1', 'CC(C)(C)CC(N)=O', 'CCNS(=O)(=O)c1ccc(OC)cc1', 'CC(C)(C)CC(=O)NCCN', 'COc1ccc([SH](=O)=O)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.