['CCC', 'C[C@@H]1C[C@H](C)CN(C[C@H](O)CO)C1', 'CC(C)O', 'C[C@@H]1C[C@H](C)CN(C[C@@H](C)O)C1', 'CC(C)OC[C@H](C)O', 'C[C@@H]1CNC[C@H](C)C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CCNCC1.