['CC', 'CSc1ccc(CNC(N)=S)cc1', 'CCNC(N)=S', 'CSc1ccc(C)cc1', 'CCNC(=S)NC', 'CSc1ccccc1', 'CS', 'CCNC(=S)NCc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.