['N#Cc1ccc(O)cc1', 'CC(O)CN(C)CC(C)C#N', 'N#Cc1ccccc1', 'CC(C#N)CN(C)CC(O)CO', 'CC(C)C#N', 'CNCC(O)COc1ccc(C#N)cc1', 'CNCC(C)C#N', 'CC(O)COc1ccc(C#N)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.