IR-ATR: 3249, 3195, 3119, 2970, 2934, 1674, 1633, 1575, 1495, 1280, 1180, 1042, 680 cm-1. 1H NMR (300 MHz, DMSO-d6): ppm = 10.02 (s, 2H, NH), 9.73 (s, 2H, NH), 9.52 (br s, 2H, OH), 9.40 (s, 2H, NH), 7.48 (d, 4H, J = 10.17 Hz, CHAr), 7.15 (d, 4H, J = 8.45 Hz, CHAr), 6.99 (s, 2H, CHAr), 6.87 (s, 2H, CHAr), 5.36 (s, 2H, CH), 3.77 (s, 6H, OCH3), 2.81 (s, 4H, CH2CH2), 2.10 (s, 6H, CH3).
13C NMR (75 MHz, DMSO-d6): ppm = 175.13, 165.26, 148.76, 143.77, 137.15, 137.07, 135.71, 135.24, 128.92, 122.40, 120.20, 110.41, 110.07, 107.44, 56.52, 54.91, 37.02, 16.97.