1H NMR (400 MHz, DMSO-= 2.1 Hz, 1H), 7.63 (d, = 8.8 Hz, 2H), 7.57 (d, = 8.5 Hz, 1H), 7.49 (d, = 5.1 RPB8 Hz, 1H), 7.45 C 7.36 (m, 2H), 7.10 (dd, = 5.0, 3.7 Hz, 1H), 6.62 … Continue reading 1H NMR (400 MHz, DMSO-= 2