['O=[SH](=O)c1ccsc1', 'C1Cn2c(nnc2C2CC2)CN1', 'C1CC1', 'O=S(=O)(c1ccsc1)N1CCn2cnnc2C1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1ccsc1)N1CCn2c(nnc2C2CC2)C1.