['CO', 'CCNC(=S)N(C)Cc1cscn1', 'CCOC', 'CN(Cc1cscn1)C(N)=S', 'Cc1cscn1', 'CNC(=S)NCCOC', 'c1cscn1', 'COCCNC(=S)N(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cscn1.