“…Yellow solid; 42 % yield (42 mg); 1 H NMR (400 MHz, CDCl 3 ): δ =15.47 (br s, 1 H), 9.90 (s, 1 H), 8.53 (ddd, J= 5.2, 1.9, 1.0 Hz, 1 H), 8.38 (d, J= 2.1 Hz, 1 H), 8.06 (dt, J= 8.4, 1.1 Hz, 1 H), 7.92 (ddd, J= 8.3, 7.5, 1.8 Hz, 1 H), 7.82 (dd, J= 8.5, 2.0 Hz, 1 H), 7.34 (ddd, J= 7.5, 5.1, 1.1 Hz, 1 H), 7.11 ppm (d, J= 8.5 Hz, 1 H); 13 C NMR (100 MHz, CDCl 3 ): δ =190.7, 166.2, 156.7, 145.7, 138.5, 133.5, 128.6, 128.2, 122.6, 119.5, 119.4, 118.9 ppm; HRMS (ESI): m / z calcd for C 12 H 10 NO 2 : 200.0707 [ M +H] + ; found: 200.0700. The measured NMR data agreed with the literature values …”