Methyl coumalate

Mass

MS2009-04082CW      
methyl 2-oxo-2H-pyran-5-carboxylate
C7H6O4              (Mass of molecular ion:    154)

   Source Temperature: 250 °C
   Sample Temperature:  20 °C
   Direct, 70 eV

      15.0      14.8
      17.0       2.1
      18.0       9.3
      25.0       1.0
      26.0       3.1
      27.0       5.5
      28.0       3.7
      29.0      13.9
      31.0       2.5
      36.0       1.4
      37.0      14.4
      38.0      37.8
      39.0      73.3
      40.0       5.9
      41.0       3.7
      42.0       8.0
      43.0       1.9
      44.0       1.0
      45.0       2.4
      49.0       2.5
      50.0       6.2
      51.0       2.6
      52.0       1.0
      53.0      15.8
      54.0       2.1
      55.0       8.2
      57.0       7.1
      59.0      12.4
      65.0       3.0
      66.0      24.1
      67.0      12.9
      68.0      38.1
      69.0       6.5
      70.0       2.4
      71.0       1.4
      75.0       1.0
      81.0       1.0
      83.0      13.2
      84.0       2.8
      85.0       5.7
      93.0       2.6
      94.0      53.7
      95.0      64.2
      96.0       4.9
      97.0       3.7
      98.0      50.7
      99.0       3.4
     111.0       4.8
     112.0       3.0
     122.0       4.7
     123.0      64.9
     124.0       4.4
     125.0       2.9
     126.0     100.0
     127.0       6.8
     128.0       1.0
     139.0       2.0
     140.0       1.6
     153.0       1.2
     154.0      61.6
     155.0       7.0