['CCNCC(C)C', 'CC(C=O)Oc1cccc(C#N)c1', 'N#Cc1cccc(O)c1', 'CCC(=O)N(CC)CC(C)C', 'N#Cc1ccccc1', 'CCN(CC(C)C)C(=O)C(C)O', 'CC', 'CC(C)CNC(=O)C(C)Oc1cccc(C#N)c1', 'CC(C)C', 'CCNC(=O)C(C)Oc1cccc(C#N)c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.