['CC', 'CC(CO)NS(=O)(=O)c1ccc(C#N)cc1', 'CCO', 'CC(C)NS(=O)(=O)c1ccc(C#N)cc1', 'CCCOCC', 'N#Cc1ccc(S(N)(=O)=O)cc1', 'CCOCC(C)N', 'N#Cc1ccc([SH](=O)=O)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.