['Nc1cccc(Br)c1', 'CCN(CC=O)CC(C)C#N', 'CC', 'CC(C#N)CNCC(=O)Nc1cccc(Br)c1', 'CCNCC(C)C#N', 'CC(=O)Nc1cccc(Br)c1', 'CC(C)C#N', 'CCNCC(=O)Nc1cccc(Br)c1', 'Brc1ccccc1', 'CCN(CC(N)=O)CC(C)C#N']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.