['CC(C)O', 'C[C@@H](C=O)Sc1nc2ccccc2[nH]1', 'CCC', 'C[C@H](Sc1nc2ccccc2[nH]1)C(=O)O', 'CCC(=O)OC(C)C', 'Sc1nc2ccccc2[nH]1', 'CC(C)OC(=O)[C@H](C)S', 'c1ccc2[nH]cnc2c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2[nH]cnc2c1.