['C#CCN', 'CC(=O)c1cccc(S(=O)(=O)NCCC=O)c1', 'C#CC', 'CC(=O)c1cccc(S(=O)(=O)NCCC(N)=O)c1', 'C#CCNC(=O)CC', 'CC(=O)c1cccc(S(N)(=O)=O)c1', 'C#CCNC(=O)CCN', 'CC(=O)c1cccc([SH](=O)=O)c1', 'CC=O', 'C#CCNC(=O)CCNS(=O)(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.