C17H12
 17 20
    2.0000    2.4853    0.0000 C
    2.8697    1.9917    0.0000 C
    3.7217    2.4991    0.0000 C
    4.5931    2.0256    0.0000 C
    4.6309    1.0347    0.0000 C
    5.5370    0.5208    0.0000 C
    5.5370   -0.5208    0.0000 C
    4.6309   -1.0347    0.0000 C
    4.5931   -2.0256    0.0000 C
    3.7217   -2.4991    0.0000 C
    2.8697   -1.9917    0.0000 C
    2.8709   -1.0000    0.0000 C
    2.0049   -0.5000    0.0000 C
    2.0049    0.5000    0.0000 C
    2.8709    1.0000    0.0000 C
    3.7370    0.5000    0.0000 C
    3.7370   -0.5000    0.0000 C
   1    2    5    5
   2    3    5    5
   3    4    5    5
   4    5    5    5
   5    6    5    5
   6    7    5    5
   7    8    5    5
   8    9    5    5
   9   10    5    5
  10   11    5    5
  11   12    5    5
  12   13    5    5
  13   14    5    5
  14   15    5    5
   2   15    5    5
  15   16    5    5
   5   16    5    5
  16   17    5    5
   8   17    5    5
  12   17    5    5