['CN', 'CCCN(CC=O)C(=O)C1(C#N)CCCCC1', 'CCCNCC(=O)NC', 'N#CC1(C=O)CCCCC1', 'CCC', 'CNC(=O)CNC(=O)C1(C#N)CCCCC1', 'CNC(C)=O', 'CCCNC(=O)C1(C#N)CCCCC1', 'N#CC1CCCCC1', 'CCCN(C=O)CC(=O)NC']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCCCC1.