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MassMS-IW-4190 5-methyl-6,7-dihydro-5H-cyclopentapyrazine C8H10N2 (Mass of molecular ion: 134)
Source Temperature: 240 °C Sample Temperature: 150 °C Reservoir, 75 eV
26.0 1.2 27.0 2.0 28.0 2.1 39.0 4.7 40.0 1.5 41.0 3.4 51.0 1.9 52.0 4.1 53.0 2.9 54.0 2.7 55.0 1.0 64.0 1.0 65.0 5.0 66.0 2.4 67.0 1.2 77.0 2.2 78.0 14.8 79.0 6.0 80.0 3.9 92.0 9.0 93.0 2.0 105.0 1.3 106.0 1.4 107.0 2.3 118.0 4.9 119.0 100.0 120.0 9.4 131.0 2.3 132.0 2.3 133.0 30.9 134.0 57.8 135.0 5.7
400 MHz in CDCl3
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1H NMR 399.65 MHz C8 H10 N2 0.05 ml : 0.5 ml CDCl3 5-methyl-6,7-dihydro-5H-cyclopentapyrazine 
Assign. Shift(ppm)
A 8.282 B 8.258 C 3.256 D *1 3.02 E *1 3.00 F 2.456 G 1.744 J 1.378 ASSIGNED BY CH-COSY
Hz ppm Int.3312.74 8.290 135 3311.89 8.287 193 3310.91 8.285 151 3309.94 8.283 206 3309.08 8.280 292 3308.23 8.278 188 3302.00 8.263 281 3301.03 8.260 274 3299.07 8.255 179 3298.10 8.253 176 1313.96 3.288 50 1312.99 3.286 66 1305.91 3.268 119 1304.93 3.266 102 1298.95 3.251 105 1297.85 3.248 120 1290.89 3.231 69 1289.92 3.228 50 1216.06 3.043 33 1213.26 3.036 113 1212.40 3.034 112 1208.62 3.025 150 1207.89 3.023 199 1204.10 3.013 123 1203.37 3.012 121 1199.46 3.002 259 1198.85 3.000 271 1191.16 2.981 106 1190.19 2.979 109 1181.64 2.957 34 998.66 2.499 58 994.14 2.488 55 990.60 2.479 104 985.96 2.468 147 982.42 2.459 67 981.20 2.456 68 977.78 2.447 154 973.14 2.435 107 969.60 2.427 60 964.97 2.415 54 716.06 1.792 64 707.28 1.770 108 703.25 1.760 56 699.10 1.750 106 694.46 1.738 106 690.06 1.727 56 686.16 1.717 101 677.25 1.695 50 554.32 1.388 1000 547.36 1.370 974
in CDCl3
liquid film
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