['O=CC[C@@H]1C=CCC1', 'CC(C)c1nnc(N)s1', 'CC(C)c1nncs1', 'NC(=O)C[C@@H]1C=CCC1', 'CCC', 'O=C(C[C@@H]1C=CCC1)Nc1nncs1', 'C1=CCCC1', 'CC(=O)Nc1nnc(C(C)C)s1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(C[C@@H]1C=CCC1)Nc1nncs1.