['CC(C)(C)SCC=O', 'Nc1ccc(-c2nccs2)cc1', 'CC(C)C', 'O=C(CS)Nc1ccc(-c2nccs2)cc1', 'CC(C)(C)S', 'CC(=O)Nc1ccc(-c2nccs2)cc1', 'CC(C)(C)SCC(N)=O', 'c1ccc(-c2nccs2)cc1', 'c1cscn1', 'CC(C)(C)SCC(=O)Nc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(-c2nccs2)cc1.