['Cc1csc(Br)c1', 'CNC(=S)NC1CC1', 'C1CC1', 'CN(Cc1csc(Br)c1)C(N)=S', 'Brc1cccs1', 'CN(C)C(=S)NC1CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is S=C(NCc1ccsc1)NC1CC1.