['N#Cc1ccc(N)cc1', 'CC(C)CN(CCC=O)C(C)C', 'CC(C)C', 'CC(C)NCCC(=O)Nc1ccc(C#N)cc1', 'CC(C)CNC(C)C', 'CCC(=O)Nc1ccc(C#N)cc1', 'CCC', 'CC(C)CNCCC(=O)Nc1ccc(C#N)cc1', 'N#Cc1ccccc1', 'CC(C)CN(CCC(N)=O)C(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.