Mass

MS-IW-5559          
dimethyl 2,5-dioxo-1,4-cyclohexanedicarboxylate
C10H12O6            (Mass of molecular ion:    228)

   Source Temperature: 140 °C
   Sample Temperature: 110 °C
   Direct, 75 eV

      15.0       5.1
      18.0       2.9
      26.0       1.4
      27.0       6.6
      28.0       3.7
      29.0       2.2
      31.0       2.4
      32.0       1.1
      39.0       4.1
      40.0       3.4
      41.0       5.0
      42.0       2.0
      43.0       3.3
      45.0       2.4
      50.0       1.0
      51.0       2.8
      52.0       4.2
      53.0      10.5
      54.0       5.7
      55.0      22.2
      56.0       1.7
      57.0       1.5
      59.0      10.5
      63.0       1.2
      65.0       1.0
      66.0       1.0
      68.0       6.0
      69.0       8.2
      70.0       1.5
      71.0       1.1
      79.0       2.5
      80.0       4.6
      81.0       7.0
      82.0       4.6
      83.0       6.9
      85.0       3.6
      86.0       3.1
      87.0      12.1
      95.0       1.2
      96.0      30.1
      97.0       4.1
      98.0       4.7
      99.0       2.9
     101.0       2.5
     107.0       4.2
     108.0      11.8
     109.0      10.8
     110.0       5.6
     111.0       1.4
     112.0       2.8
     113.0      19.2
     114.0       3.9
     115.0       6.3
     119.0       2.1
     123.0       1.1
     124.0       1.1
     125.0       2.8
     126.0       1.0
     128.0      96.4
     129.0       6.7
     134.0       1.5
     135.0       6.3
     136.0      35.1
     137.0      47.3
     138.0       4.4
     139.0       1.7
     140.0       6.5
     141.0       4.9
     150.0       1.0
     151.0       2.7
     162.0       3.8
     163.0       4.4
     164.0      17.3
     165.0      27.6
     166.0       2.7
     167.0      15.3
     168.0      15.4
     169.0      14.8
     170.0       1.4
     178.0      35.9
     179.0       6.1
     181.0       5.7
     194.0       4.4
     195.0       8.2
     196.0      60.5
     197.0      27.9
     198.0       3.2
     199.0      16.7
     200.0       2.5
     210.0      16.0
     211.0       2.2
     213.0      12.6
     214.0       1.3
     226.0       1.7
     227.0       3.8
     228.0     100.0
     229.0      12.5
     230.0       1.9

Assign. Shift(ppm) A 12.1 B 3.796 C 3.172

     Hz     ppm     Int.

   4843.84  12.121    231
   1517.17   3.797   1000
   1268.06   3.173    697