['NCCS', 'C[C@]12CCCC[C@@H]1CC[C@H]1[C@H]3CC[C@](C)(O)[C@@]3(C)CC[C@@H]12', 'CCN', 'C[C@]12CCCC[C@@H]1CC[C@H]1[C@H]3CC[C@@](O)(CS)[C@@]3(C)CC[C@@H]12', 'CSCCN', 'C[C@]12CCCC[C@@H]1CC[C@H]1[C@H]3CC[C@@H](O)[C@@]3(C)CC[C@@H]12']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is C1CC[C@@H]2CC[C@@H]3[C@H](CCC4CCC[C@@H]43)C2C1.