['CC(C)CO', 'NCc1ccc(C(N)=O)cc1', 'CC(CN)CO', 'Cc1ccc(C(N)=O)cc1', 'NC=O', 'CC(CO)CNCc1ccccc1', 'CNCC(C)CO', 'NC(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.