['O=C/C=C/c1cccc(Cl)c1', 'O=S(=O)(/C=C/c1ccccc1)N1CCNCC1', 'O=[SH](=O)/C=C/c1ccccc1', 'O=C(/C=C/c1cccc(Cl)c1)N1CCNCC1', 'Cc1cccc(Cl)c1', 'CC(=O)N1CCN(S(=O)(=O)/C=C/c2ccccc2)CC1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is O=C(/C=C/c1ccccc1)N1CCN(S(=O)(=O)/C=C/c2ccccc2)CC1.