['CC', 'Cc1cc(S(=O)(=O)NC(C)CO)ccc1Br', 'CCO', 'Cc1cc(S(=O)(=O)NC(C)C)ccc1Br', 'CCCOCC', 'Cc1cc(S(N)(=O)=O)ccc1Br', 'CCOCC(C)N', 'Cc1cc([SH](=O)=O)ccc1Br']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.