['CCO', 'CC(=O)c1ccc(OCCCC=O)cc1', 'CC', 'CC(=O)c1ccc(OCCCC(=O)O)cc1', 'CCCC(=O)OCC', 'CC(=O)c1ccc(O)cc1', 'CCOC(=O)CCCO', 'CC(=O)c1ccccc1', 'CC=O', 'CCOC(=O)CCCOc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.