['CC(C)(C)CC=O', 'N#Cc1ccccc1CS(=O)(=O)NC(=O)CN', 'CC(C)(C)CC(=O)NCC=O', 'N#Cc1ccccc1CS(N)(=O)=O', 'CC(C)(C)CC(N)=O', 'CC(=O)NS(=O)(=O)Cc1ccccc1C#N', 'CC(C)(C)CC(=O)NCC(N)=O', 'N#Cc1ccccc1C[SH](=O)=O', 'N#Cc1ccccc1', 'CC(C)(C)CC(=O)NCC(=O)NS(C)(=O)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.