['CO', 'Cc1noc(C)c1CNC(=S)NC(C)C', 'CCCOC', 'Cc1noc(C)c1CNC(N)=S', 'Cc1noc(C)c1C', 'COCC(C)NC(N)=S', 'Cc1cc(C)on1', 'CNC(=S)NC(C)COC']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cnoc1.