['CCOC(C=O)CC', 'NS(=O)(=O)c1ccc2c(c1)OCCCO2', 'CC', 'CCC(O)C(=O)NS(=O)(=O)c1ccc2c(c1)OCCCO2', 'CCO', 'CCCC(=O)NS(=O)(=O)c1ccc2c(c1)OCCCO2', 'CCOC(CC)C(N)=O', 'O=[SH](=O)c1ccc2c(c1)OCCCO2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)OCCCO2.