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