['CC(=O)O', 'Cc1cn(Cc2ccccc2)nc1C(C)(C)C', 'Cc1ccccc1', 'CC(C)(C)c1n[nH]cc1/C=C/C(=O)O', 'CC(C)C', 'O=C(O)/C=C/c1cnn(Cc2ccccc2)c1', 'c1ccccc1', 'Cn1cc(/C=C/C(=O)O)c(C(C)(C)C)n1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc(Cn2cccn2)cc1.