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MassMS-NW-6855 1-ethyl-7-methyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid C12H12N2O3 (Mass of molecular ion: 232)
Source Temperature: 210 °C Sample Temperature: 160 °C Direct, 75 eV
18.0 1.9 27.0 4.4 28.0 2.4 29.0 2.6 38.0 1.3 39.0 4.0 40.0 1.0 41.0 1.0 42.0 1.7 44.0 1.8 50.0 1.3 51.0 3.0 52.0 3.2 53.0 5.6 62.0 1.5 63.0 4.2 64.0 3.4 65.0 4.0 66.0 1.5 75.0 1.1 76.0 2.6 77.0 4.7 78.0 2.5 79.0 1.4 80.0 1.1 89.0 2.4 90.0 2.0 91.0 2.4 92.0 4.8 93.0 2.7 102.0 1.4 103.0 1.6 104.0 6.0 105.0 2.2 107.0 1.1 116.0 1.5 117.0 2.3 118.0 1.4 119.0 1.3 120.0 1.4 129.0 1.2 130.0 1.2 131.0 7.0 132.0 13.0 133.0 2.0 145.0 7.3 146.0 1.1 159.0 7.2 160.0 22.4 161.0 3.2 173.0 9.4 174.0 1.2 187.0 6.7 188.0 100.0 189.0 13.4 190.0 1.1 232.0 6.8 233.0 1.0
90 MHz in DMSO-d6
400 MHz in DMSO-d6
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1H NMR 89.56 MHz C12 H12 N2 O3 0.035 g : 0.5 ml DMSO-d6 1-ethyl-7-methyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid 
Assign. Shift(ppm)
A 14.87 B 9.174 C 8.602 D 7.597 E 4.64 F 2.712 G 1.425 J(C,D)=8.2HZ.
Hz ppm Int.1331.62 14.869 117 821.68 9.175 328 774.86 8.652 125 766.72 8.561 150 684.28 7.641 161 675.92 7.548 133 419.69 4.687 172 412.55 4.607 185 242.93 2.713 1000 134.55 1.503 219 127.51 1.424 494 120.48 1.346 195
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1H NMR 399.65 MHz C12 H12 N2 O3 saturated in DMSO-d6 1-ethyl-7-methyl-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid Assign. Shift(ppm)
A 14.9 B 9.196 C 8.620 D 7.611 E 4.650 F 2.718 G 1.423
Hz ppm Int.5968.99 14.936 31 5965.57 14.927 57 5964.84 14.926 60 5964.11 14.924 59 3675.29 9.197 328 3449.46 8.632 157 3441.41 8.612 167 3045.90 7.622 156 3037.84 7.602 150 1869.38 4.678 59 1862.06 4.660 190 1854.98 4.642 193 1847.90 4.624 60 1086.43 2.719 1000 575.93 1.442 214 573.24 1.435 37 568.85 1.424 471 565.67 1.416 34 565.19 1.415 32 561.77 1.406 212
in DMSO-d6
KBr disc
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