['CC=O', 'CNCC(=O)NC1CCCN(S(C)(=O)=O)C1', 'CC(=O)N(C)CC=O', 'CS(=O)(=O)N1CCCC(N)C1', 'CNC(C)=O', 'CC(=O)NC1CCCN(S(C)(=O)=O)C1', 'C[SH](=O)=O', 'CC(=O)N(C)CC(=O)NC1CCCNC1', 'CC(=O)N(C)CC(N)=O', 'CS(=O)(=O)N1CCCCC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCNCC1.