['CC(C)(C)O', 'CCCNc1nnc(SCC=O)s1', 'CC(C)C', 'CCCNc1nnc(SCC(=O)O)s1', 'CCC', 'CC(C)(C)OC(=O)CSc1nnc(N)s1', 'CC(=O)OC(C)(C)C', 'CCCNc1nnc(S)s1', 'CCCN', 'CC(C)(C)OC(=O)CSc1nncs1', 'CC(C)(C)OC(=O)CS', 'CCCNc1nncs1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1nncs1.