12
 
  C      0.12684724      1.51756662     -0.74253756
  C     -1.11565359      0.84828599     -0.66647664
  C     -1.15419411     -0.56078134     -0.56372836
  C      0.04975754     -1.30058776     -0.53707189
  C      1.29227199     -0.63131750     -0.61316723
  C      1.33082103      0.77777085     -0.71591332
  H      2.22340984     -1.20571925     -0.61860515
  H      2.29178936      1.29382287     -0.80085152
  H      0.15609735      2.60613736     -0.84806988
  H     -2.04794713      1.41891110     -0.71322899
  H     -2.11631860     -1.08060047     -0.53094647
  H      0.01935106     -2.39292244     -0.48362365
