D0P4PZ
  -OEChem-04152122302D

  4  0  0     0  0  0  0  0  0999 V2000
    0.0000    0.0000    0.0000 Zn  0  2  0  0  0  0  0  0  0  0  0  0
    2.5000    0.0000    0.0000 Zn  0  2  0  0  0  0  0  0  0  0  0  0
    2.5000    2.5000    0.0000 Zn  0  2  0  0  0  0  0  0  0  0  0  0
    0.0000    2.5000    0.0000 Zn  0  2  0  0  0  0  0  0  0  0  0  0
M  CHG  4   1   2   2   2   3   2   4   2
M  END

$$$$