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MassMS-NW-0520 riboflavin C17H20N4O6 (Mass of molecular ion: 376)
Source Temperature: 210 °C Sample Temperature: 170 °C Direct, 75 eV
15.0 1.1 18.0 4.3 27.0 4.6 28.0 8.6 29.0 7.3 30.0 100.0 31.0 1.8 35.0 2.5 36.0 17.3 38.0 6.5 41.0 2.0 42.0 1.9 43.0 2.7 45.0 1.3 55.0 1.6 57.0 2.6 60.0 1.4 69.0 1.7 71.0 1.2 83.0 1.1 86.0 4.3 103.0 2.3
400 MHz in DMSO-d6
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1H NMR 399.65 MHz C17 H20 N4 O6 saturated in DMSO-d6 riboflavin 
Assign. Shift(ppm)
A 11.35 B 7.895 C 7.851 D *1 4.919 E *1 4.601 F 4.248 G 3.67 to 3.62 J 3.466 K *2 2.467 L *2 2.387 ASSIGNED BY C-H AND H-H COSY. J(D,E) = -12.8 HZ.
Hz ppm Int.4537.58 11.354 345 3155.23 7.895 279 3137.64 7.851 355 1979.11 4.953 31 1978.20 4.950 31 1977.83 4.949 31 1977.47 4.949 31 1976.73 4.947 30 1976.18 4.945 30 1968.49 4.926 46 1967.76 4.924 47 1967.02 4.922 47 1966.11 4.920 48 1965.56 4.919 47 1964.46 4.916 45 1960.98 4.907 35 1960.25 4.905 35 1959.70 4.904 35 1959.33 4.903 35 1958.60 4.901 36 1956.40 4.896 40 1955.67 4.894 40 1844.67 4.616 81 1832.95 4.587 70 1832.58 4.586 70 1831.85 4.584 69 1831.30 4.583 69 1702.53 4.261 90 1699.60 4.253 73 1696.12 4.245 70 1693.01 4.237 88 1470.28 3.679 31 1467.16 3.672 43 1466.80 3.671 42 1463.13 3.662 166 1460.94 3.656 196 1457.09 3.646 311 1453.06 3.636 306 1446.47 3.620 70 1392.80 3.486 82 1387.67 3.473 101 1382.36 3.459 103 1377.78 3.448 50 1375.95 3.443 50 994.23 2.488 43 986.90 2.470 1000 978.29 2.448 39 954.30 2.388 952
in DMSO-d6
KBr disc
nujol mull
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