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MassMS-IW-3561 4-methoxy-2-butanone C5H10O2 (Mass of molecular ion: 102)
Source Temperature: 210 °C Sample Temperature: 160 °C Reservoir, 75 eV
14.0 2.3 15.0 20.6 18.0 1.8 26.0 3.6 27.0 13.1 28.0 12.8 29.0 18.2 30.0 1.2 31.0 22.7 32.0 2.7 33.0 8.8 38.0 1.1 39.0 4.3 41.0 6.3 42.0 22.4 43.0 100.0 44.0 6.7 45.0 94.5 46.0 3.9 53.0 1.2 55.0 32.2 56.0 1.4 57.0 5.8 58.0 3.0 59.0 10.2 60.0 3.7 61.0 1.2 69.0 1.2 70.0 30.5 71.0 29.7 72.0 13.2 73.0 1.2 74.0 4.9 75.0 25.1 83.0 1.0 85.0 1.9 87.0 59.3 88.0 3.0 101.0 3.9 102.0 36.1 103.0 2.3
parameter in CDCl3
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1H NMR 300 MHz C5 H10 O2 0.05 ml : 0.5 ml CDCl3 4-methoxy-2-butanone 
Parameter ppm Hz
D(A) 3.640 D(C) 2.686 D(D) 2.184 J(A,C) 6.0 J(A,D) 0.0 J(C,D) 0.4 D(B) 3.332
Hz ppm Int.1098.07 3.660 157 1092.08 3.640 326 1086.07 3.620 170 999.60 3.332 1000 811.74 2.706 116 805.72 2.686 218 799.74 2.666 106 655.21 2.184 737
in CDCl3
liquid film
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