['CC(C)(C)C(N)CCO', 'O=CNCc1ccc(F)cc1', 'NCc1ccc(F)cc1', 'CC(C)(C)C(CCO)NC=O', 'CC(C)(C)CCCO', 'NC(=O)NCc1ccc(F)cc1', 'Cc1ccc(F)cc1', 'CC(C)(C)C(CCO)NC(N)=O', 'Fc1ccccc1', 'CNC(=O)NC(CCO)C(C)(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.