['CC(C)C', 'O=C(O)c1ccc(CO)o1', 'CC(C)(C)O', 'Cc1ccc(C(=O)O)o1', 'O=CO', 'CC(C)(C)OCc1ccco1', 'COC(C)(C)C', 'O=C(O)c1ccco1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccoc1.