['CC', 'CCNCCNc1nc2ccc(C)cc2s1', 'CCNCC', 'CCNc1nc2ccc(C)cc2s1', 'CCN(CC)CC', 'Cc1ccc2nc(N)sc2c1', 'CCN(CC)CCN', 'Cc1ccc2ncsc2c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2scnc2c1.