B57
  -OEChem-06282419213D

 17 17  0     0  0  0  0  0  0999 V2000
    0.3670   -2.2930   -0.0250 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2040   -1.2140   -0.0120 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.5280   -0.0220    0.0010 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.0090   -0.0460   -0.0010 N   0  3  0  0  0  0  0  0  0  0  0  0
    2.6340    0.9940   -0.0960 O   0  5  0  0  0  0  0  0  0  0  0  0
    2.6010   -1.1070    0.0920 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5520   -1.1500   -0.0150 N   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1790    0.0580   -0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5480    0.1020   -0.0040 N   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4970    1.1830    0.0170 N   0  0  0  0  0  0  0  0  0  0  0  0
   -0.1590    1.1830    0.0160 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.5340    2.3760    0.0300 N   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0750   -1.9670   -0.0280 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.0600   -0.7210   -0.0160 H   0  0  0  0  0  0  0  0  0  0  0  0
   -4.0050    0.9580    0.0070 H   0  0  0  0  0  0  0  0  0  0  0  0
    1.5010    2.3760   -0.0510 H   0  0  0  0  0  0  0  0  0  0  0  0
    0.0550    3.2150    0.1190 H   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0  0  0  0
  2  3  1  0  0  0  0
  2  7  1  0  0  0  0
  3  4  1  0  0  0  0
  3 11  2  0  0  0  0
  4  5  1  0  0  0  0
  4  6  2  0  0  0  0
  7  8  1  0  0  0  0
  7 13  1  0  0  0  0
  8  9  1  0  0  0  0
  8 10  2  0  0  0  0
  9 14  1  0  0  0  0
  9 15  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  1  0  0  0  0
 12 16  1  0  0  0  0
 12 17  1  0  0  0  0
M  CHG  2   4   1   5  -1
M  END
> <OPENEYE_ISO_SMILES>
c1(c(nc([nH]c1=O)N)N)[N+](=O)[O-]

> <OPENEYE_INCHI>
InChI=1S/C4H5N5O3/c5-2-1(9(11)12)3(10)8-4(6)7-2/h(H5,5,6,7,8,10)

> <OPENEYE_INCHIKEY>
XNFGVBWYGFPSDN-UHFFFAOYSA-N

> <FORMULA>
C4H5N5O3

$$$$