1H NMR (400 MHz, 298 K, DMSO) δH 11.11 (1H, br s, OH), 9.83 (1H, s, HC=O), 8.31 (1H, d, 4JHH = 2.5 Hz, Py), 7.84 (1H, d, 3JHH = 8.5 Hz, Py), 7.33 (1H, dd, 3JHH = 8.5 Hz, 4JHH = 2.5 Hz, Py).
13C{1H} NMR (100 MHz, 298K, DMSO) δC 191.8 (C=O), 157.9 (Py), 144.7 (Py), 138.7 (Py), 123.6 (Py), 122.3 (Py).
MS (ESI) m/z 124.3 [M+H]+, 146.2 [M+Na]+, 122.0 [M-H]-.
IR v cm-1 2506 w, 1694 m, 1597 w, 1567 s, 1471 w, 1311 m, 1273 m, 1209 s, 1115 s, 1024 m, 911 m, 871 m, 847 s, 790 s, 730 m, 660 s.
Elemental Analysis found (Calculated for C6H5NO2) % C 58.47 (58.54), H 4.07 (4.09), N 11.22 (11.38).