Elemental analysis found (calculated for C23H19N3O6∙3H2O) %: C 56.91 (56.67), H 5.17 (5.17), N 8.55 (8.62).
1H NMR (400 MHz, 298 K, CDCl3) δH 5.71 (s, 2H, CH), 7.31-7.43 (m, 6H, Ph-H), 7.54 (d, 4H, JHH=8Hz, Ph-H), 8.13 (t, 1H, JHH=8Hz, pyr), 8.26 (d, 2H, JHH=8Hz)
13C NMR (100 MHz, 298 K, CDCl3) δC 58.2 (CH), 126.4, 128.7, 129.5, 130.0 (Ph), 138.0, 140.7, 150.0 (pyr), 165.3 (C=O), 173.6 (COOH)
MS (ESI+) m/z 456.12 [(M+Na]+), 889.24 ([2M+Na]+)
IR (cm-1) ν 3391, 3036, 1725, 1669, 1513, 1442, 1389, 1319, 1253, 1182, 1095, 1074, 1030, 1001, 967, 843, 749, 724, 695, 663