['C#CCN', 'O=CCSCc1ccc(Cl)s1', 'C#CC', 'NC(=O)CSCc1ccc(Cl)s1', 'C#CCNC(C)=O', 'SCc1ccc(Cl)s1', 'Cc1ccc(Cl)s1', 'C#CCNC(=O)CS', 'Clc1cccs1', 'C#CCNC(=O)CSC']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccsc1.