['CC(C)(C)O', 'O=CN1CCn2cccc2[C@@H]1C(=O)O', 'CC(C)(C)OC=O', 'O=C(O)[C@@H]1NCCn2cccc21', 'CC(C)C', 'O=C(O)[C@H]1c2cccn2CCN1C(=O)O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1cc2n(c1)CCNC2.