['CCOCC(C)N', 'O=Cc1ccc(Br)cc1F', 'CC', 'CC(CO)NC(=O)c1ccc(Br)cc1F', 'CCO', 'CC(C)NC(=O)c1ccc(Br)cc1F', 'CCCOCC', 'NC(=O)c1ccc(Br)cc1F', 'Fc1cccc(Br)c1', 'CCOCC(C)NC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.