White solid, Rf= 0.11 (50% ethyl acetate/hexane), m.p. 212-214 ºC.
IR-ATR: 3566, 3221, 3103, 2939, 1701, 1680, 1630, 1579 cm-1. 1H NMR (400 MHz, DMSO-d6): ppm = 7.04 (1H, d, J= 1.69 Hz, Har), 6.76 (1H, d, J= 1.66 Hz, Har), 5.92 (1H, br s, NH), 5.81-5.88 (2H, m, CH2=CH), 5.5 (1H, br s, NH or OH), 5.46 (1H, br s, NH or OH), 5.35 (1H, d, J=2.55 Hz, CH2=CH ), 5.23 (1H, d, J=7.55 Hz, CH2=CH), 5.19 (1H, s, CHNH), 4.57-4.54 (1H, m, CH2O), 3.87 (3H, s, CH3O), 2.37 (3H, s, CH3). 13C NMR (100 MHz, DMSO-d6): ppm = 165.08, 152.58, 147.26, 146.57, 142.89, 136.31, 132.17, 122.81, 118.30, 108.50, 108.29, 100.96, 64.97, 56.37, 55.33, 19.00.