['CNC(=O)[C@@H](C)O', 'CC(C)c1cc(C=O)c2ccccc2n1', 'CN', 'CC(C)c1cc(C(=O)O[C@H](C)C=O)c2ccccc2n1', 'CCC(=O)NC', 'CC(C)c1cc(C(=O)O)c2ccccc2n1', 'CNC(=O)[C@@H](C)OC=O', 'CC(C)c1ccc2ccccc2n1', 'CCC', 'CNC(=O)[C@@H](C)OC(=O)c1ccnc2ccccc12']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2ncccc2c1.