['O=[SH](=O)C1CC1', 'Cn1nccc1C1CC2CCC(C1)N2', 'Cn1cccn1', 'O=S(=O)(C1CC1)N1C2CCCC1CC2']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(C1CC1)N1C2CCC1CC(c1ccn[nH]1)C2.