['CC(C)(C)N', 'CC(C=O)NS(=O)(=O)c1ccc2c(c1)CCCC2', 'CCC(=O)NC(C)(C)C', 'NS(=O)(=O)c1ccc2c(c1)CCCC2', 'CC(C)C', 'CC(NS(=O)(=O)c1ccc2c(c1)CCCC2)C(N)=O', 'CC(N)C(=O)NC(C)(C)C', 'O=[SH](=O)c1ccc2c(c1)CCCC2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)CCCC2.