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MassMS-NW-9132 (-)-3-ureido-L-alanine C4H9N3O3 (Mass of molecular ion: 147)
Source Temperature: 220 °C Sample Temperature: 190 °C Direct, 75 eV
15.0 4.4 16.0 9.9 17.0 18.1 18.0 17.4 27.0 1.9 28.0 18.5 29.0 12.6 30.0 100.0 31.0 6.3 40.0 1.2 41.0 3.8 42.0 14.6 43.0 20.7 44.0 20.7 45.0 2.1 46.0 1.2 56.0 2.4 57.0 16.1 58.0 4.4 59.0 7.6 60.0 1.7 61.0 6.0 69.0 1.6 73.0 23.6 74.0 10.7 75.0 30.5 84.0 3.8 85.0 24.7 86.0 4.9 87.0 3.6 102.0 3.3 104.0 5.7 112.0 1.5
400 MHz in D2O
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1H NMR 399.65 MHz C4 H9 N3 O3 0.033 g : 0.5 ml D2O (-)-3-ureido-L-alanine 
Assign. Shift(ppm)
A 3.876 B *1 3.717 C *1 3.530 THE SOLVENT PEAK SUPPRESSED.
Hz ppm Int.1561.89 3.909 44 1561.28 3.907 46 1560.79 3.906 51 1554.32 3.890 764 1550.90 3.881 975 1548.10 3.874 1000 1544.56 3.865 948 1497.44 3.747 611 1494.02 3.739 604 1488.04 3.724 87 1482.18 3.709 893 1478.76 3.701 872 1470.95 3.681 49 1420.41 3.555 812 1413.94 3.538 762 1405.27 3.517 579 1398.80 3.501 525
in D2O
KBr disc
nujol mull
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