['CC(C)(C)NCC=O', 'CCCS(=O)(=O)N1CCC(N)CC1', 'CC(C)(C)N', 'CCCS(=O)(=O)N1CCC(NC(C)=O)CC1', 'CC(C)C', 'CCCS(=O)(=O)N1CCC(NC(=O)CN)CC1', 'CCC[SH](=O)=O', 'CC(C)(C)NCC(=O)NC1CCNCC1', 'CC(C)(C)NCC(N)=O', 'CCCS(=O)(=O)N1CCCCC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCNCC1.