['NCCS(N)(=O)=O', 'CC(C)(C)c1ncc(C=O)s1', 'CCS(N)(=O)=O', 'CC(C)(C)c1ncc(C(N)=O)s1', 'NS(=O)(=O)CCNC=O', 'CC(C)(C)c1nccs1', 'CC(C)C', 'NS(=O)(=O)CCNC(=O)c1cncs1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cscn1.