NMR:
1H NMR (600 MHz, DMSO-d6) 11.91 (s, 1H), 10.59 (s, 1H), 10.09 (s, 1H), 9.65 (s, 1H), 8.62 (d, J = 7.8 Hz, 1H), 8.51 (d, J = 3.6 Hz, 1H), 8.44 (s, 1H), 8.14 (s, 1H), 7.94 (d, J = 8.4 Hz, 2H), 7.77 (d, J = 8.4 Hz, 2H), 7.50 (d, J = 7.8 Hz, 1H), 7.47 (d, J = 7.8 Hz, 1H), 7.37 (d, J = 7.8 Hz, 1H), 7.26 (t, J = 7.8 Hz, 1H), 7.15 (t, J = 7.8 Hz, 1H), 7.07 (t, J = 7.8 Hz, 1H), 6.77 (m, 1H), 6.49 (d, J = 15.0 Hz, 1H), 3.95 (d, J= 6.0 Hz, 2H), 2.79 (s, 6H)
13C NMR (400 MHz, DMSO-d6) 165.2, 163.9, 158.6, 158.5, 157.5, 142.5, 142.0, 140.9, 139.7, 136.5, 131.6, 129.9, 129.1 (2C), 128.8, 126.5, 126.4, 123.6, 122.8, 121.1, 118.8 (2C), 115.9, 115.6, 115.1, 113.1, 112.2, 111.3, 59.9, 45.3 (2C)
