['CC(C)C', 'Nc1ncc(Sc2ccccc2)s1', 'Sc1ccccc1', 'CC(C)(C)c1csc(N)n1', 'c1ccccc1', 'CC(C)(C)c1nc(N)sc1S']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(Sc2cncs2)cc1.