['CC(C)O', 'COCc1nc2ccccc2n1[C@H](C)C=O', 'CO', 'Cc1nc2ccccc2n1[C@H](C)C(=O)OC(C)C', 'CCC', 'COCc1nc2ccccc2n1[C@H](C)C(=O)O', 'CCC(=O)OC(C)C', 'COCc1nc2ccccc2[nH]1', 'COC', 'CC(C)OC(=O)[C@@H](C)n1cnc2ccccc21']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2[nH]cnc2c1.