['CC', 'CC(C)c1ccc(S(=O)(=O)NCC#N)cc1', 'CC#N', 'CCNS(=O)(=O)c1ccc(C(C)C)cc1', 'CCNCC#N', 'CC(C)c1ccc([SH](=O)=O)cc1', 'CCC', 'CCN(CC#N)S(=O)(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.