['CC(C)CCC=O', 'CCc1nc(CNC)cs1', 'CCc1nc(C)cs1', 'CNC(=O)CCC(C)C', 'CC', 'CC(C)CCC(=O)N(C)Cc1cscn1', 'CCc1nccs1', 'CC(C)CCC(=O)N(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cscn1.