['CC(C)(C)N', 'Cc1cc2nc(N(C)CC=O)c3ccccc3n2n1', 'CC(=O)NC(C)(C)C', 'CNc1nc2cc(C)nn2c2ccccc12', 'CC(C)C', 'Cc1cc2nc(N(C)CC(N)=O)c3ccccc3n2n1', 'CNCC(=O)NC(C)(C)C', 'Cc1cc2ncc3ccccc3n2n1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2c(c1)cnc1ccnn12.