['CCOCC(C)N', 'Cc1[nH]c2ccc(C=O)cc2c1C', 'CC', 'Cc1[nH]c2ccc(C(=O)NC(C)CO)cc2c1C', 'CCO', 'Cc1[nH]c2ccc(C(=O)NC(C)C)cc2c1C', 'CCCOCC', 'Cc1[nH]c2ccc(C(N)=O)cc2c1C', 'CCOCC(C)NC=O', 'Cc1[nH]c2ccccc2c1C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2[nH]ccc2c1.