“…1 H NMR (400 MHz, CDCl 3 ) δ 11.70 (s, 1H), 11.37 (s, 1H), 8.69 (d, J = 11.7 Hz, 1H), 7.91 (dd, J = 13.5, 3.3 Hz, 1H), 7.43 (dd, J = 8.1, 3.5 Hz, 1H), 7.40–7.30 (m, 2H), 7.02 (dd, J = 8.4, 4.9 Hz, 1H), 6.95 (t, J = 7.5 Hz, 1H), 2.63 (s, 3H, CH 3 ); 13 C NMR (101 MHz, CDCl 3 ) δ 168.17, 167.57, 164.88, 164.75, 162.26, 160.27, 159.90, 157.68, 143.84, 133.55, 132.67, 122.67, 122.42, 119.90, 119.77, 117.84, 117.37, 117.20, 14.93 ( Figures S3, S4 ). 11 …”