“…The 1 H and 13 C NMR spectra of the QRT were recorded at 500 mHz ( 1 H NMR) and 125 mHz (13C NMR) using the Bruker (Advance) NMR instrument in DMSO solvent. 41 1 H NMR (500 MHZ, DMSO- d 6 ): δ 6.18 (d, 1H, J = 2 Hz), 6.40 (d, 1H, J = 1.5 Hz), 6.87 (d, 1H, J = 9 Hz), 7.52 (dd, 1H, J = 2.5 and 8.5 Hz), and 7.67 (d, 1H, J = 2.5 Hz). 13 C NMR (125 MHZ, DMSO- d 6 ): δ 93.32, 98.15, 102.98, 115.03, 115.57, 119.94, 121.92, 135.70, 145.03, 146.77, 147.67, 156.11, 160.69, 163.85, and 175.81.…”