['CC(C)N', 'CN(CC(=O)NC=O)Cc1cccc(C#N)c1', 'CC(C)NC=O', 'CN(CC(N)=O)Cc1cccc(C#N)c1', 'CC(C)NC(N)=O', 'CN(CC=O)Cc1cccc(C#N)c1', 'CCC', 'CN(CC(=O)NC(N)=O)Cc1cccc(C#N)c1', 'CC(=O)NC(=O)NC(C)C', 'CNCc1cccc(C#N)c1', 'Cc1cccc(C#N)c1', 'CNCC(=O)NC(=O)NC(C)C', 'N#Cc1ccccc1', 'CC(C)NC(=O)NC(=O)CN(C)C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.