1H NMR (400 MHz, 298 K, DMSO) δH 9.90 (1H, s, C=O), 8.53 (1H, d, 4JHH = 3.0 Hz, Py), 7.97 (1H, d, 3JHH = 8.5 Hz, Py), 7.64 (1H, dd, 3JHH = 8.5 Hz, 4JHH = 3.0 Hz, Py), 5.05 (2H, d, 4JHH = 2.5 Hz, CH2-C≡C), 3.71 (1H, t, 4JHH = 2.5 Hz, C≡CH).
13C{1H} NMR (100 MHz, 298K, DMSO) δC 191.9 (C=O), 156.7 (Py), 146.1 (Py), 138.8 (Py), 123.3 (Py), 121.7 (Py), 79.4 (C≡CH), 78.9 (C≡CH), 56.3 (CH2).
MS (ESI) 162.2 [M+H]+, 184.1 [M+Na]+.
IR ν cm-1: 3213 w, 2127 w, 1692 s, 1569 s, 1490 w, 1474 w, 1379 w, 1308 m, 1282 w, 1259 s, 1203 s, 1132 m, 1006 s, 975 m, 916 w, 835 s, 800 s, 762 m, 732 m, 694 s, 659 s.
Elemental Analysis found (Calculated for C9H7NO2) % C 66.85 (67.07), H 4.02 (4.38), N 8.52 (8.69).