['C/C=C/C', 'NCc1ccc(C(=O)O)cc1', 'C/C=C/CN', 'Cc1ccc(C(=O)O)cc1', 'O=CO', 'C/C=C/CNCc1ccccc1', 'CC', 'CCNCc1ccc(C(=O)O)cc1', 'C/C=C/CNC', 'O=C(O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.