['C[C@@H](N)C(=O)O', 'CC(C)(C)c1ccc(OCCCC=O)cc1', 'CC(C)(C)c1ccc(O)cc1', 'CCCC(=O)N[C@H](C)C(=O)O', 'CC(C)(C)c1ccccc1', 'C[C@@H](NC(=O)CCCO)C(=O)O', 'CCC(=O)O', 'CC(C)(C)c1ccc(OCCCC(N)=O)cc1', 'CC(C)C', 'C[C@@H](NC(=O)CCCOc1ccccc1)C(=O)O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.