Quinoxaline, 2-phenyl-, 1,4-dioxide

Mass

MS2003-01732WA      
2-phenylquinoxaline 1,4-dioxide
C14H10N2O2          (Mass of molecular ion:    238)

   Source Temperature: 250 °C
   Sample Temperature:  45 °C
   Direct, 70 eV
   comment:  it might be that there is impurity at m/z 222.

      18.0       1.5
      39.0       4.3
      50.0       7.2
      51.0       8.7
      52.0       3.1
      62.0       2.2
      63.0       7.1
      64.0       4.0
      65.0       3.9
      74.0       3.5
      75.0       6.4
      76.0      13.4
      77.0      19.5
      78.0       4.1
      87.0       1.1
      88.0       1.5
      89.0       4.8
      90.0       7.5
      91.0       3.6
      92.0       3.5
      96.0       1.4
      96.5       2.2
     101.0       1.3
     102.0       9.1
     103.0       4.5
     104.0       2.5
     105.0      11.7
     106.0       1.3
     114.0       1.1
     115.0       1.4
     116.0       1.0
     118.0       1.7
     126.0       1.0
     127.0       2.0
     128.0       1.8
     129.0       3.9
     130.0       1.1
     133.0       2.1
     139.0       2.5
     140.0       2.9
     150.0       1.0
     151.0       2.9
     152.0       3.9
     153.0       2.2
     154.0       2.6
     155.0       4.5
     156.0       3.2
     163.0       1.3
     164.0       2.1
     165.0       2.5
     166.0       5.4
     167.0       4.7
     168.0       5.3
     176.0       1.1
     177.0       2.1
     178.0       5.1
     179.0       8.3
     180.0       5.6
     181.0      11.9
     182.0       2.8
     183.0       1.1
     184.0       7.2
     190.0       2.1
     191.0       2.3
     192.0      13.4
     193.0      22.8
     194.0      12.0
     195.0       2.5
     197.0       2.2
     205.0       1.9
     206.0       3.7
     207.0      10.8
     208.0       2.5
     209.0       5.0
     210.0       4.6
     211.0       1.0
     220.0       1.1
     221.0      12.5
     222.0      23.3
     223.0       3.7
     237.0      23.2
     238.0     100.0
     239.0      15.8
     240.0       1.6