Mass

MS2003-01634WA      
3-methoxyphthalide
C9H8O3              (Mass of molecular ion:    164)

   Source Temperature: 250 °C
   Sample Temperature: 270 °C
   Reservoir, 70 eV

      18.0       1.6
      29.0       1.9
      38.0       1.5
      39.0       2.7
      44.0       2.4
      50.0      13.6
      51.0      17.7
      52.0       1.2
      62.0       1.8
      63.0       2.9
      64.0       1.4
      65.0       2.1
      74.0       6.3
      75.0       5.8
      76.0      15.8
      77.0      28.5
      78.0       2.0
      89.0      10.5
      90.0      21.2
      91.0      21.7
      92.0      11.7
     104.0       9.0
     105.0      33.9
     106.0       2.6
     119.0      16.9
     120.0      36.8
     121.0       3.3
     133.0     100.0
     134.0       8.6
     135.0       2.8
     136.0      18.7
     137.0       1.5
     163.0      13.3
     164.0       2.6