['CCO', 'NCCNCc1ccccc1C(F)(F)F', 'NCCO', 'CCNCc1ccccc1C(F)(F)F', 'CCNCCO', 'NCc1ccccc1C(F)(F)F', 'NCCNCCO', 'Cc1ccccc1C(F)(F)F', 'CNCCNCCO', 'FC(F)(F)c1ccccc1', 'FC(F)F', 'OCCNCCNCc1ccccc1']
The Murcko scaffold (minmal number of connected rings) of <smiles></smiles> is c1ccccc1.