1H-Pyrrole-3,4-dicarboxylic acid, 2,5-dimethyl-, diethyl ester

Mass

MS2004-02251WA      
diethyl 2,5-dimethyl-3,4-pyrroledicarboxylate
C12H17NO4           (Mass of molecular ion:    239)

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

      27.0       1.5
      29.0       1.9
      41.0       1.1
      42.0       8.5
      43.0       1.7
      51.0       2.4
      52.0       2.5
      53.0       1.7
      65.0       1.7
      66.0       1.2
      67.0       4.9
      74.5       1.9
      79.0       3.4
      80.0       2.6
      92.0       1.2
      93.0      12.5
      94.0       3.7
     120.0       4.2
     121.0      20.2
     122.0       5.9
     137.0      17.4
     138.0       4.5
     148.0       1.3
     149.0       6.1
     150.0       3.7
     164.0      34.5
     165.0      40.7
     166.0      57.2
     167.0       5.4
     192.0       1.0
     193.0     100.0
     194.0      46.7
     195.0       5.3
     239.0      32.7
     240.0       4.6