['CC(N)C(=O)NC(C)(C)C', 'Cc1cc(C=O)c2ccc(F)cc2n1', 'CC(C)(C)N', 'Cc1cc(C(=O)NC(C)C=O)c2ccc(F)cc2n1', 'CCC(=O)NC(C)(C)C', 'Cc1cc(C(N)=O)c2ccc(F)cc2n1', 'CC(C)C', 'Cc1cc(C(=O)NC(C)C(N)=O)c2ccc(F)cc2n1', 'CC(NC=O)C(=O)NC(C)(C)C', 'Cc1ccc2ccc(F)cc2n1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2ncccc2c1.