['O=[SH](=O)C1CCS(=O)(=O)CC1', 'CC1(C)CNC[C@]2(C[C@@H]3CC[C@H]2C3)O1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S1(=O)CCC(S(=O)(=O)N2CCO[C@@]3(C[C@@H]4CC[C@H]3C4)C2)CC1.