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