['Cn1nncc1[SH](=O)=O', 'C(=C/C1CCCN1)\\c1ccccc1', 'Cc1ccccc1', 'CC1CCCN1S(=O)(=O)c1cnnn1C']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=S(=O)(c1cnn[nH]1)N1CCCC1/C=C/c1ccccc1.