['CC(C)(C)NCC=O', 'Cc1ccc(N)nc1', 'CC(C)(C)N', 'CC(=O)Nc1ccc(C)cn1', 'CC(C)C', 'Cc1ccc(NC(=O)CN)nc1', 'Cc1cccnc1', 'CC(C)(C)NCC(N)=O']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccncc1.