['CNC(=O)[C@H](C)O', 'COc1ccc(Cl)cc1C=O', 'CN', 'COc1ccc(Cl)cc1C(=O)O[C@@H](C)C=O', 'CCC(=O)NC', 'COc1ccc(Cl)cc1C(=O)O', 'CO', 'CNC(=O)[C@H](C)OC(=O)c1cccc(Cl)c1', 'CNC(=O)[C@H](C)OC=O', 'COc1ccc(Cl)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.