['CO', 'CC(C)(C)[C@@H]1NC(=O)CC[C@H]1Nc1ncccn1', 'COc1ccncn1', 'CC(C)(C)[C@@H]1NC(=O)CC[C@H]1N', 'COc1ccnc(N)n1', 'CC(C)(C)[C@H]1CCCC(=O)N1', 'CC(C)C', 'COc1ccnc(N[C@@H]2CCC(=O)NC2)n1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C1CC[C@@H](Nc2ncccn2)CN1.