['CC(C)(C)CC(=O)NCC=O', 'CC(=O)c1ccc(S(N)(=O)=O)cc1', 'CC(C)(C)CC=O', 'CC(=O)c1ccc(S(=O)(=O)NC(=O)CN)cc1', 'CC(C)(C)CC(N)=O', 'CC(=O)NS(=O)(=O)c1ccc(C(C)=O)cc1', 'CC(C)(C)CC(=O)NCC(N)=O', 'CC(=O)c1ccc([SH](=O)=O)cc1', 'CC=O', 'CC(C)(C)CC(=O)NCC(=O)NS(=O)(=O)c1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.