['CS(N)(=O)=O', 'CCCSc1ccc2ccccc2c1', 'CCCNS(C)(=O)=O', 'Sc1ccc2ccccc2c1', 'C[SH](=O)=O', 'NCCCSc1ccc2ccccc2c1', 'CS(=O)(=O)NCCCS', 'c1ccc2ccccc2c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2ccccc2c1.