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MassMS-NW-9897 6,7-dihydroxy-2-chromenone C9H6O4 (Mass of molecular ion: 178)
Source Temperature: 230 °C Sample Temperature: 150 °C Direct, 75 eV
17.0 1.2 18.0 6.6 27.0 1.3 28.0 4.6 29.0 1.2 37.0 1.0 38.0 3.5 39.0 5.1 40.0 1.8 41.0 1.4 42.0 3.0 43.0 1.4 47.0 3.4 49.0 1.0 50.0 7.1 51.0 9.7 52.0 4.6 53.0 6.6 54.0 1.3 55.0 1.3 61.0 2.0 62.0 1.5 63.0 2.0 65.0 4.0 66.0 5.9 69.0 12.6 70.0 1.4 74.0 1.3 75.0 10.4 76.0 8.1 77.0 1.7 79.0 5.4 80.0 3.4 81.0 2.5 89.0 2.0 93.0 1.0 94.0 7.9 104.0 5.6 108.0 1.2 109.0 1.0 121.0 5.0 122.0 3.2 132.0 3.2 149.0 1.9 150.0 59.7 151.0 5.4 177.0 2.4 178.0 100.0 179.0 13.5 180.0 1.6
400 MHz in DMSO-d6
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1H NMR 399.65 MHz C9 H6 O4 0.038 g : 0.5 ml DMSO-d6 6,7-dihydroxy-2-chromenone 
Assign. Shift(ppm)
A *1 10. B *1 9.5 C 7.893 D 7.021 E 6.790 F 6.201
Hz ppm Int.3159.33 7.906 421 3150.02 7.882 432 2806.24 7.022 1000 2713.62 6.790 846 2483.06 6.214 649 2473.60 6.190 661
in DMSO-d6
KBr disc
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