“…= 205–210°C; m.p lit . = 186–188°C 32 ; IR (KBr): v 3381, 2931, 1712, 1608, 1448, and 1157 cm −1 ; 1 H NMR (400 MHz, DMSO‐d 6 ) (ppm) = 8.04–8.13 (m, 1 H), 7.99 (d, J = 8.0 Hz, 1 H, ArH), 7.93 (d, J = 8.0 Hz, 1 H, ArH), 7.70–7.81 (m, 2 H, ArH), 7.57–7.63 (m, 1 H, ArH), 7.40–7.45 (m, 2 H, ArH), 7.05–7.17 (m, 2 H, ArH, OH), 6.36 (d, J = 8.0 Hz, 1 H, ArH), 6.29 (d, J = 4.0 Hz, 1 H, ArH), 6.02 (s, 1 H, OH), 1.79–2.16 (m, 4 H), 0.90 (s, 3 H, Me), 0.78 (s, 3 H, Me).…”