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MassMS-IW-9456 4,9-dimethoxy-7-methylfuro(3,2-g)chromen-5-one C14H12O5 (Mass of molecular ion: 260)
Source Temperature: 170 °C Sample Temperature: 150 °C Direct, 75 eV
15.0 4.2 18.0 2.6 27.0 2.5 28.0 5.9 29.0 2.0 37.0 1.3 38.0 5.0 39.0 8.9 40.0 2.0 43.0 12.1 50.0 2.6 51.0 5.8 52.0 1.3 53.0 4.5 55.0 1.7 59.0 1.0 61.0 2.8 62.0 5.0 63.0 5.1 64.0 1.4 65.0 3.8 66.0 9.2 67.0 8.7 68.0 2.2 69.0 2.4 73.0 1.7 74.0 2.9 75.0 3.8 76.0 2.1 77.0 8.3 78.0 2.9 79.0 2.3 80.0 1.0 81.0 4.2 83.0 2.2 86.0 1.4 87.0 3.2 88.0 1.1 89.0 3.2 90.0 4.5 91.0 3.7 92.0 3.6 93.0 3.1 94.0 6.3 95.0 5.3 101.0 3.3 102.0 3.8 103.0 1.7 104.0 1.2 105.0 14.0 106.0 3.4 107.0 1.1 109.0 1.7 115.0 2.0 116.0 1.3 117.0 1.6 118.0 3.6 119.0 5.2 120.0 1.2 121.0 2.7 122.0 1.8 123.0 1.6 130.0 7.5 130.5 1.1 131.0 1.9 132.0 1.4 133.0 2.8 134.0 4.9 143.0 1.1 145.0 1.5 146.0 1.6 147.0 11.8 148.0 1.6 149.0 3.3 150.0 3.1 151.0 1.5 153.0 2.4 159.0 1.7 160.0 2.7 161.0 4.8 162.0 4.1 163.0 1.7 171.0 1.4 173.0 3.3 174.0 2.8 175.0 13.4 176.0 2.0 177.0 19.1 178.0 2.1 184.0 1.4 186.0 1.0 187.0 2.0 188.0 1.0 189.0 29.2 190.0 5.0 191.0 1.8 199.0 1.1 201.0 4.6 202.0 6.0 203.0 1.6 205.0 5.0 214.0 3.5 215.0 6.8 216.0 78.8 217.0 47.4 218.0 6.3 219.0 1.0 227.0 7.9 228.0 2.4 229.0 2.0 230.0 4.9 231.0 39.6 232.0 5.9 243.0 2.4 244.0 2.9 245.0 100.0 246.0 14.6 247.0 2.1 259.0 4.8 260.0 89.9 261.0 15.7 262.0 2.2
400 MHz in CDCl3
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1H NMR 399.65 MHz C14 H12 O5 0.040 g : 0.5 ml CDCl3 4,9-dimethoxy-7-methylfuro(3,2-g)chromen-5-one 
Assign. Shift(ppm)
A 7.639 B 7.023 C 6.062 D 4.199 E 4.064 F 2.400
Hz ppm Int.3054.32 7.643 206 3052.12 7.637 208 2808.11 7.027 208 2805.91 7.021 201 2423.22 6.064 165 2422.49 6.062 169 1678.10 4.199 1000 1624.15 4.064 969 959.59 2.402 534 958.86 2.400 533
in CDCl3
KBr disk
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