['CC(C)CN', 'Cc1cc(C)c(S(=O)(=O)NCCC=O)c(C)c1', 'CCC(=O)NCC(C)C', 'Cc1cc(C)c(S(N)(=O)=O)c(C)c1', 'CC(C)C', 'Cc1cc(C)c(S(=O)(=O)NCCC(N)=O)c(C)c1', 'CC(C)CNC(=O)CCN', 'Cc1cc(C)c([SH](=O)=O)c(C)c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.