['CC(C)CCCNC=O', 'Cc1cccc(N2CCNCC2)c1C', 'CC(C)CCCN', 'Cc1cccc(N2CCN(C=O)CC2)c1C', 'CCCC(C)C', 'Cc1cccc(N2CCN(C(N)=O)CC2)c1C', 'Cc1ccccc1C', 'CC(C)CCCNC(=O)N1CCNCC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(N2CCNCC2)cc1.