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