“…1 H NMR (400 MHz, CDCl3): δ =7.80 (2H, d, J = 8.5 Hz, H-3,5 Ar), 7.75 (2H, d, J = 8.5 Hz, H-2,6 Ar),6.98 (1H, s, H-5), 5.25 (2H, s, NH2), 3.63 (4H, s, O-CH2), 2.89 (4H, s, N-CH2), 2.75 (3H, s, 4-CH3), 2.47 (3H, s, 6-CH3) 13. C NMR (100 MHz, CDCl3): δ = 159.09 (C-7a), 156.60 (C-6), 143.79 (C-4), 139.70 (C-3), 138.22 (C-4 Ar), 131.74 (C-1 Ar), 128.98 (2C, C-3,5-Ar), 128.57 (2C, C2,6 Ar), 125.34 (C-3a), 122.44 (C-5), 107.92 (C-2), 65.76 (2C, O-CH2), 46.32 (2C, N-CH2), 24.06 (6-CH3), 20.25 (4-CH3).…”