['CC', 'CCNCCNc1nc2ccc(Cl)cc2s1', 'CCNCC', 'CCNc1nc2ccc(Cl)cc2s1', 'CCN(CC)CC', 'Nc1nc2ccc(Cl)cc2s1', 'CCN(CC)CCN', 'Clc1ccc2ncsc2c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2scnc2c1.