['CCOCC(C)N', 'Cc1ccc(O)c(C=O)c1', 'CC', 'Cc1ccc(O)c(C(=O)NC(C)CO)c1', 'CCO', 'Cc1ccc(O)c(C(=O)NC(C)C)c1', 'CCCOCC', 'Cc1ccc(O)c(C(N)=O)c1', 'Cc1ccc(O)cc1', 'CCOCC(C)NC=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.