['CC(C)(C)N', 'CC1(C)SCC1NC=O', 'CC(C)(C)NC=O', 'CC1(C)SCC1N', 'CC(C)C', 'CC1(C)SCC1NC(N)=O', 'CC1(C)CCS1', 'CC(C)(C)NC(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CSC1.