Betamethasone

Mass

MS-IW-4299          
9alpha-fluoro-11beta,17,21-trihydroxy-16beta-methyl-1,4-pregnadiene-3,20-dione
C22H29FO5           (Mass of molecular ion:    392)

   Source Temperature: 160 °C
   Sample Temperature: 130 °C
   Direct, 75 eV

      17.0       2.5
      18.0      13.3
      27.0       1.2
      28.0       4.7
      29.0       7.3
      30.0       6.7
      31.0       3.7
      32.0       2.0
      39.0       1.7
      41.0       6.3
      42.0       1.1
      43.0       6.7
      53.0       2.4
      55.0       6.0
      57.0       2.9
      60.0       2.0
      65.0       2.0
      67.0       2.9
      69.0       4.9
      71.0       2.3
      77.0       5.4
      78.0       1.1
      79.0       3.6
      81.0       3.4
      83.0       2.0
      85.0       1.5
      87.0       1.9
      91.0       9.5
      92.0       2.1
      93.0       4.0
      94.0       1.5
      95.0       3.8
      96.0       1.2
      97.0       2.2
      99.0       1.1
     103.0       1.7
     105.0       3.7
     106.0       1.0
     107.0       9.8
     108.0       4.0
     109.0       4.9
     110.0       1.4
     111.0       3.0
     113.0       1.2
     115.0       2.7
     116.0       1.0
     117.0       3.0
     119.0       3.3
     120.0       2.3
     121.0      37.8
     122.0     100.0
     123.0      11.9
     124.0       2.6
     125.0       2.6
     127.0       1.7
     128.0       1.6
     129.0       1.7
     131.0       2.6
     132.0       1.0
     133.0       5.0
     134.0       7.4
     135.0      11.9
     136.0       4.7
     137.0       3.3
     138.0       1.0
     139.0       6.2
     140.0       1.3
     141.0       2.4
     143.0       1.2
     144.0       1.0
     145.0       4.0
     146.0       3.2
     147.0      12.2
     148.0       2.1
     149.0       2.4
     151.0       1.4
     152.0       1.9
     153.0       2.0
     155.0       1.0
     157.0       1.6
     158.0       2.3
     159.0       5.9
     160.0       9.6
     161.0       4.9
     162.0       1.0
     163.0       1.8
     165.0       2.1
     167.0       1.2
     169.0       1.1
     171.0       3.3
     172.0       1.5
     173.0       3.0
     174.0       1.3
     175.0       1.8
     177.0       1.4
     178.0       1.1
     179.0       2.1
     181.0       1.5
     183.0       1.3
     184.0       2.0
     185.0       2.9
     186.0       3.9
     187.0       4.3
     188.0       1.2
     189.0       1.8
     191.0       1.3
     193.0       1.1
     195.0       1.9
     197.0       2.1
     199.0       1.7
     202.0       1.3
     203.0       1.0
     207.0       1.0
     208.0       1.3
     209.0       2.5
     210.0       1.3
     211.0       2.7
     212.0       1.2
     213.0       4.2
     214.0       1.7
     221.0       1.6
     222.0       1.0
     223.0       8.7
     224.0       3.4
     225.0       3.1
     226.0       1.7
     227.0       3.9
     228.0       1.2
     236.0       1.6
     237.0       3.4
     238.0       4.7
     239.0       2.5
     240.0       2.4
     241.0       3.0
     242.0       9.8
     243.0       2.3
     251.0       1.2
     253.0       8.9
     254.0       2.6
     255.0       7.7
     256.0       2.2
     263.0       1.0
     267.0       1.1
     268.0       3.3
     269.0       1.7
     277.0       1.7
     279.0       1.7
     281.0       1.4
     284.0       2.4
     294.0       1.0
     295.0       2.3
     296.0       1.1
     297.0       1.0
     299.0       1.0
     312.0       9.9
     313.0       2.8
     314.0       1.1
     324.0       2.0
     325.0       1.1
     333.0       2.3
     342.0      25.0
     343.0       6.4
     344.0       1.2
     372.0       1.4