['CC(C#N)CN(C)CC=O', 'NCC1(c2ccccc2)CC1', 'CC(C)C#N', 'CNCC(=O)NCC1(c2ccccc2)CC1', 'CNCC(C)C#N', 'CC(=O)NCC1(c2ccccc2)CC1', 'CC1(c2ccccc2)CC1', 'CC(C#N)CN(C)CC(N)=O', 'c1ccc(C2CC2)cc1', 'CNC(=O)CN(C)CC(C)C#N', 'c1ccccc1', 'CC(C#N)CN(C)CC(=O)NCC1CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(C2CC2)cc1.