['CC(CO)CNC(=O)C=O', 'Cc1cccc(C(C)C)c1N', 'CC(CN)CO', 'Cc1cccc(C(C)C)c1NC(=O)C=O', 'CC(C)CO', 'Cc1cccc(C(C)C)c1NC(=O)C(N)=O', 'Cc1cccc(C(C)C)c1', 'CC(CO)CNC(=O)C(N)=O', 'CCC', 'Cc1ccccc1NC(=O)C(=O)NCC(C)CO']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.