['CC(C)O', 'CC(=O)Nc1ccccc1OCC=O', 'CC=O', 'CC(C)OC(=O)COc1ccccc1N', 'CC(=O)OC(C)C', 'CC(=O)Nc1ccccc1O', 'CCC', 'CC(=O)Nc1ccccc1OCC(=O)O', 'CC(C)OC(=O)CO', 'CC(=O)Nc1ccccc1', 'CC(N)=O', 'CC(C)OC(=O)COc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.