['CO', 'CSCC(=O)Nc1ccc(F)c(C=O)c1', 'CSCC=O', 'COC(=O)c1cc(N)ccc1F', 'CS', 'COC(=O)c1cc(NC(C)=O)ccc1F', 'CSCC(N)=O', 'COC(=O)c1ccccc1F', 'COC=O', 'CSCC(=O)Nc1ccc(F)cc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.