12
 
  C      0.12783358      1.52167097     -0.71020886
  C     -1.11618867      0.85156686     -0.63398202
  C     -1.15478517     -0.55923775     -0.53114258
  C      0.05064658     -1.29995701     -0.50448707
  C      1.29467927     -0.62985335     -0.58060630
  C      1.33327260      0.78095795     -0.68347284
  H      2.22615477     -1.20257903     -0.56427880
  H      2.29457156      1.29849347     -0.74663942
  H      0.15756124      2.61162294     -0.79415915
  H     -2.04785457      1.42366814     -0.65898704
  H     -2.11627346     -1.07741082     -0.47671133
  H      0.02072735     -2.39055355     -0.42945055
