['CNC(=O)[C@@H](C)O', 'CCOc1ncccc1C=O', 'CN', 'CCOc1ncccc1C(=O)O[C@H](C)C=O', 'CC', 'CNC(=O)[C@@H](C)OC(=O)c1cccnc1O', 'CCC(=O)NC', 'CCOc1ncccc1C(=O)O', 'CCO', 'CNC(=O)[C@@H](C)OC(=O)c1cccnc1', 'CNC(=O)[C@@H](C)OC=O', 'CCOc1ccccn1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccncc1.