['CNC', 'CC(C)C(C=O)NCc1cnc(N2CCCC2)nc1', 'CC(C)CC(=O)N(C)C', 'NCc1cnc(N2CCCC2)nc1', 'CC(C)C(N)C(=O)N(C)C', 'Cc1cnc(N2CCCC2)nc1', 'C1CCNC1', 'CC(C)C(NCc1cncnc1)C(=O)N(C)C', 'CNC(C(=O)N(C)C)C(C)C', 'c1cnc(N2CCCC2)nc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cnc(N2CCCC2)nc1.