['C[C@H](O)C(=O)NC(C)(C)C', 'COc1cc(CC=O)ccc1C', 'CC(C)(C)N', 'COc1cc(CC(=O)O[C@@H](C)C=O)ccc1C', 'CCC(=O)NC(C)(C)C', 'COc1cc(CC(=O)O)ccc1C', 'CO', 'Cc1ccc(CC(=O)O[C@@H](C)C(=O)NC(C)(C)C)cc1', 'CC(C)C', 'COc1cc(CC(=O)O[C@@H](C)C(N)=O)ccc1C', 'COc1ccccc1C', 'CC(=O)O[C@@H](C)C(=O)NC(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.