['CN(CC#N)CC=O', 'COc1ccc(Cl)cc1N', 'CO', 'CN(CC#N)CC(=O)Nc1cccc(Cl)c1', 'CNCC#N', 'COc1ccc(Cl)cc1NC(C)=O', 'CC#N', 'CNCC(=O)Nc1cc(Cl)ccc1OC', 'CN(CC#N)CC(N)=O', 'COc1ccc(Cl)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.