['CC(C)(C)N', 'CNc1nc(S[C@H](C)C=O)nc2ccccc12', 'CC(C)C', 'CNc1nc(S[C@H](C)C(N)=O)nc2ccccc12', 'CCC(=O)NC(C)(C)C', 'CNc1nc(S)nc2ccccc12', 'CN', 'C[C@@H](Sc1ncc2ccccc2n1)C(=O)NC(C)(C)C', 'C[C@@H](S)C(=O)NC(C)(C)C', 'CNc1ncnc2ccccc12']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccc2ncncc2c1.