['Nc1ccc2c(c1)CCO2', 'Cc1noc(C)c1[SH](=O)=O', 'c1ccc2c(c1)CCO2', 'Cc1noc(C)c1S(N)(=O)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(Nc1ccc2c(c1)CCO2)c1cnoc1.