['CC', 'CC(CO)NS(=O)(=O)c1ccc(F)cc1Br', 'CCO', 'CC(C)NS(=O)(=O)c1ccc(F)cc1Br', 'CCCOCC', 'NS(=O)(=O)c1ccc(F)cc1Br', 'CCOCC(C)N', 'O=[SH](=O)c1ccc(F)cc1Br']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.