['CCOCC(C)N', 'O=Cc1cc2ccccc2[nH]1', 'CC', 'CC(CO)NC(=O)c1cc2ccccc2[nH]1', 'CCO', 'CC(C)NC(=O)c1cc2ccccc2[nH]1', 'CCCOCC', 'NC(=O)c1cc2ccccc2[nH]1', 'CCOCC(C)NC=O', 'c1ccc2[nH]ccc2c1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2[nH]ccc2c1.