['Cc1cc(C=O)on1', 'CC(C)[C@@H]1C[C@@H](CN)c2ccccc21', 'Cc1cc(C(N)=O)on1', 'CC(C)[C@@H]1C[C@@H](C)c2ccccc21', 'Cc1ccon1', 'CC(C)[C@@H]1C[C@@H](CNC=O)c2ccccc21']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(NC[C@@H]1CCc2ccccc21)c1ccno1.