['CCN(C)C', 'CCc1ccc2nc(N)sc2c1', 'CNC', 'CCNc1nc2ccc(CC)cc2s1', 'CN(C)CCN', 'CCc1ccc2ncsc2c1', 'CC', 'CN(C)CCNc1nc2ccccc2s1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2scnc2c1.