1H NMR (400 MHz, DMSO-D6) δ 10.80 (s, 1H, H-5′), 9.55 (s, 1H, H-11), 8.29 (s, 1H, H-2), 7.97 (d, J = 8.8 Hz, 1H, H-5), 7.42–7.36 (m, 2H, H-2′ and H-2″), 6.94 (dd, J = 8.8, 2.3 Hz, 1H, H-6), 6.86 (d, J = 2.2 Hz, 1H, H-8), 6.84–6.78 (m, 2H, H-3′ and H-3″). 13C NMR (101 MHz, DMSO-D6) δ 174.74 (C-4), 162.55 (C-7), 157.47 (C-9), 157.22 (C-4′), 152.87 (C-2), 130.13 (C-2′ and C-2″), 127.34 (C-5), 123.52 (C-3), 122.58 (C-1′), 116.67 (C-10), 115.16 (C-3′ and C-3″), 114.99 (C-6), and 102.14 (C-8).
Free full text: Click here
