['CCC(CC)(CC=O)C(=O)O', 'CCOc1c(N)cccc1Cl', 'CC', 'CCC(CC)(CC(=O)Nc1cccc(Cl)c1O)C(=O)O', 'CCO', 'CCC(CC)(CC(=O)Nc1cccc(Cl)c1)C(=O)O', 'CCOc1ccccc1Cl', 'CCC(CC)(CC(N)=O)C(=O)O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.